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A137960 as a simple table

na(n)
01
11
22
311
450
5275
61560
79212
856082
9348675
102207120
1114171155
1292075064
13604266000
143999688050
1526670727220
16178997024610
171208160130227
188195828345756
1955849242272130
20382119958804520
212624041637846210

[1,1,2,11,50,275,1560,9212,56082,348675,2207120,
 14171155,92075064,604266000,3999688050,
 26670727220,178997024610,1208160130227,
 8195828345756,55849242272130,382119958804520,
 2624041637846210]