10:     6 8 8 = 8 6 * 8
18:     13 16 15 = 16 13 * 15
28:     22 26 24 = 26 22 * 24
40:     33 38 35 = 38 33 * 35
54:     46 52 48 = 52 46 * 48
70:     61 68 63 = 68 61 * 63
88:     78 86 80 = 86 78 * 80

Base: a = x*(x+3)  for all x > 1
Digits:
a - (x+2),
a - 2,
a - x

6:     1 3 3 = 3 1 * 3
14:     2 9 4 = 4 2 * 9
26:     3 19 5 = 5 3 * 19
42:     4 33 6 = 6 4 * 33
62:     5 51 7 = 7 5 * 51
86:     6 73 8 = 8 6 * 73

Base: 2 * (x^2 + x + 1) for all x > 0
Digits:
x,
2 * x^2 + 1,
x + 2

14:     2 9 4 = 4 2 * 9
32:     4 18 8 = 8 4 * 18
50:     6 27 12 = 12 6 * 27
68:     8 36 16 = 16 8 * 36
86:     10 45 20 = 20 10 * 45

75:     3 28 9 = 9 3 * 28

Base: (y^4 + y) * x - y^2 for all x > 0, y > 1
Digits:
y * x,
(y^3 + 1) * x,
y^2 * x
(These are the only families where the digits have the form b*x c*x d*x for coprime b, c, d.)

6:     1 3 3 = 3 1 * 3
12:     3 7 6 = 7 3 * 6
18:     5 11 9 = 11 5 * 9
24:     7 15 12 = 15 7 * 12
30:     9 19 15 = 19 9 * 15
36:     11 23 18 = 23 11 * 18
42:     13 27 21 = 27 13 * 21
48:     15 31 24 = 31 15 * 24
54:     17 35 27 = 35 17 * 27
60:     19 39 30 = 39 19 * 30
66:     21 43 33 = 43 21 * 33
72:     23 47 36 = 47 23 * 36
78:     25 51 39 = 51 25 * 39
84:     27 55 42 = 55 27 * 42
90:     29 59 45 = 59 29 * 45
96:     31 63 48 = 63 31 * 48
12:     1 4 4 = 4 1 * 4
36:     4 13 12 = 13 4 * 12
60:     7 22 20 = 22 7 * 20
84:     10 31 28 = 31 10 * 28
20:     1 5 5 = 5 1 * 5
80:     5 21 20 = 21 5 * 20
30:     1 6 6 = 6 1 * 6
42:     1 7 7 = 7 1 * 7
56:     1 8 8 = 8 1 * 8
72:     1 9 9 = 9 1 * 9
90:     1 10 10 = 10 1 * 10

Base: a = x * (x + 1) * ((x - 1) * y + 1) for all x > 1, y >= 0
Digits:
x * y + 1,
x^2 * y + x + 1,
a/x
(Notice: y = 0 yields a subset of the 1ab VNs)

6:     1 3 3 = 3 1 * 3
12:     3 7 6 = 7 3 * 6
18:     5 11 9 = 11 5 * 9
24:     7 15 12 = 15 7 * 12
30:     9 19 15 = 19 9 * 15
36:     11 23 18 = 23 11 * 18
42:     13 27 21 = 27 13 * 21
48:     15 31 24 = 31 15 * 24
54:     17 35 27 = 35 17 * 27
60:     19 39 30 = 39 19 * 30
66:     21 43 33 = 43 21 * 33
72:     23 47 36 = 47 23 * 36
78:     25 51 39 = 51 25 * 39
84:     27 55 42 = 55 27 * 42
90:     29 59 45 = 59 29 * 45
96:     31 63 48 = 63 31 * 48

6:     1 2 4 = 2 1 * 4
21:     7 11 14 = 11 7 * 14
36:     13 20 24 = 20 13 * 24
51:     19 29 34 = 29 19 * 34
66:     25 38 44 = 38 25 * 44
81:     31 47 54 = 47 31 * 54
96:     37 56 64 = 56 37 * 64

16:     5 7 12 = 7 5 * 12
44:     17 23 33 = 23 17 * 33
72:     29 39 54 = 39 29 * 54
100:    41 55 75 = 55 41 * 75

30:     11 14 24 = 14 11 * 24
75:     31 39 60 = 39 31 * 60

48:     19 23 40 = 23 19 * 40

70:     29 34 60 = 34 29 * 60

96:     41 47 84 = 47 41 * 84

Base: a = x * ((2 * x - 1) * y - 3) for all x > 1, y > 0 except (x,y) = (2,1)
Digits:
x * (x - 1) * y - 2 * x + 1,
x^2 * y - 2 * x - 1,
a * (x - 1) / x
(Notice: y = 1 yields a subset of the previous family.)