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A215987 as a simple table

na(n)
71
81
93
106
1113
1226
1356
14115
15246
16530
171166
182613
195982
2013940
2133073
2279760
23195109
24483615
251212485
263071358
277850690
2820231286
2952513864
30137202595
31360578812
32952705531
332529454122
346745724961
3518063628118
3648553319703
37130962595786
38354390168855

[1,1,3,6,13,26,56,115,246,530,1166,2613,5982,
 13940,33073,79760,195109,483615,1212485,3071358,
 7850690,20231286,52513864,137202595,360578812,
 952705531,2529454122,6745724961,18063628118,
 48553319703,130962595786,354390168855]