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A003696 as a simple table

na(n)
11
256
32415
4100352
54140081
6170537640
77022359583
8289143013376
911905151192865
10490179860527896
1120182531537581071
12830989874753525760
1334214941811800329425
141408756312731277540744

[1,56,2415,100352,4140081,170537640,7022359583,
 289143013376,11905151192865,490179860527896,
 20182531537581071,830989874753525760,
 34214941811800329425,1408756312731277540744]