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A027140 as a simple table

na(n)
01
13
212
357
4264
51261
66141
730276
8150853
9758145
103836896
1119534086
1299957904
13513756551
142650822585
1513724435509
1671275344341
17371177285715
181937791196448
1910139548682524
2053165765660928
21279301910804937

[1,3,12,57,264,1261,6141,30276,150853,758145,
 3836896,19534086,99957904,513756551,2650822585,
 13724435509,71275344341,371177285715,
 1937791196448,10139548682524,53165765660928,
 279301910804937]