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A001623 as a simple table

na(n)
31
44
546
61064
735792
81673792
9103443808
108154999232
11798030483328
1294866122760704
1313460459852344064
142246551018310998016
15435626600453967929344
1697108406689489312301056
1724658059294992101453262848
187075100096781964808223653888
192277710095706779480096994066432
20817555425148510266964075644059648

[1,4,46,1064,35792,1673792,103443808,8154999232,
 798030483328,94866122760704,13460459852344064,
 2246551018310998016,435626600453967929344,
 97108406689489312301056,
 24658059294992101453262848,
 7075100096781964808223653888,
 2277710095706779480096994066432,
 817555425148510266964075644059648]