login

A057669 as a simple table

na(n)
01
12
21
34
43
52
67
77
86
93
1011
1113
1214
139
144
1516
1622
1726
1821
1913
205
2123
2234
2344
2440
2531
2617
277
2831
2950
3068
3168
3259
3341
3423
358
3641
3770
38100
39106
40101
4179
4255
4328
4410
4553
4695
47140
48157
49158
50136
51106
5268
5335
5412
5567
56125
57190
58221
59234
60214
61182
62132
6385
6442
6514
6683
67161

[1,2,1,4,3,2,7,7,6,3,11,13,14,9,4,16,22,26,21,13,
 5,23,34,44,40,31,17,7,31,50,68,68,59,41,23,8,41,
 70,100,106,101,79,55,28,10,53,95,140,157,158,136,
 106,68,35,12,67,125,190,221,234,214,182,132,85,42,
 14,83,161]