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A001624 as a simple table

na(n)
21
35
458
51274
641728
71912112
8116346400
99059742176
10877746364288
11103483282967936
1214581464284095744
132419278174185319680
14466730664414683625472
15103580258158369503481856
1626198788829773597178540032

[1,5,58,1274,41728,1912112,116346400,9059742176,
 877746364288,103483282967936,14581464284095744,
 2419278174185319680,466730664414683625472,
 103580258158369503481856,
 26198788829773597178540032]