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A223964 as a simple table

na(n)
1256
25864
341006
4176893
5594286
61718057
74500818
810981150
925334630
1055772240
11117841845
12239976226
13472531867
14902107834
151673660678
163023882381
175330533450
189183978785
1915489123731
2025608363453
2141559120445
2266283141375

[256,5864,41006,176893,594286,1718057,4500818,
 10981150,25334630,55772240,117841845,239976226,
 472531867,902107834,1673660678,3023882381,
 5330533450,9183978785,15489123731,25608363453,
 41559120445,66283141375]