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A293715 as a simple table

na(n)
12
23
34
45
56
67
78
89
910
1011
1112
1216
1318
1419
1521
1623
1724
1827
1928
2031
2133
2243
2351
2453
2554
2657
2760
2861
2962
3065
3167
3268
3369
3471
3573
3676
3779
3881
3983
4084
4189
4291
43110
44111
45115
46116
47118
48121
49124
50126
51129
52131
53132
54138
55139
56144
57145
58147
59149
60150
61153
62156

[2,3,4,5,6,7,8,9,10,11,12,16,18,19,21,23,24,27,28,
 31,33,43,51,53,54,57,60,61,62,65,67,68,69,71,73,
 76,79,81,83,84,89,91,110,111,115,116,118,121,124,
 126,129,131,132,138,139,144,145,147,149,150,153,
 156]