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A215008 as a simple table

na(n)
00
11
25
321
484
5329
61274
74900
818767
971687
10273371
111041348
123964051
1315083082
1457374296
15218205281
16829778397
173155194917
1811996903828
1945614046737
20173428037986
21659377938380
222506951364015
239531364676687
2436237879209259
25137774708539300
26523812203582283
271991504659990594

[0,1,5,21,84,329,1274,4900,18767,71687,273371,
 1041348,3964051,15083082,57374296,218205281,
 829778397,3155194917,11996903828,45614046737,
 173428037986,659377938380,2506951364015,
 9531364676687,36237879209259,137774708539300,
 523812203582283,1991504659990594]