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A181076 as a simple table

na(n)
01
11
22
35
420
5168
63659
7204644
825503314
97434144333
105248999682258
118079852389207554
1228328874782544308254
13244277149833867010587231
144673118265932181394325207044
15198007423467261943865049734612821

[1,1,2,5,20,168,3659,204644,25503314,7434144333,
 5248999682258,8079852389207554,
 28328874782544308254,244277149833867010587231,
 4673118265932181394325207044,
 198007423467261943865049734612821]