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A120901 as a simple table

na(n)
01
11
25
314
443
5156
6535
71956
87175
926418
1098375
11367176
121378022
135193625
1419641164
1574535167
16283651169
171082274210
184139129734
1915863315213
2060913982404
21234317240601
22902804442380
233483620505111
2413460665855850

[1,1,5,14,43,156,535,1956,7175,26418,98375,367176,
 1378022,5193625,19641164,74535167,283651169,
 1082274210,4139129734,15863315213,60913982404,
 234317240601,902804442380,3483620505111,
 13460665855850]