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A048861 as a simple table

na(n)
10
23
326
4255
53124
646655
7823542
816777215
9387420488
109999999999
11285311670610
128916100448255
13302875106592252
1411112006825558015
15437893890380859374
1618446744073709551615
17827240261886336764176
1839346408075296537575423
191978419655660313589123978

[0,3,26,255,3124,46655,823542,16777215,387420488,
 9999999999,285311670610,8916100448255,
 302875106592252,11112006825558015,
 437893890380859374,18446744073709551615,
 827240261886336764176,39346408075296537575423,
 1978419655660313589123978]