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A185634 as a simple table

na(n)
21
32
421
5204
62605
739990
8720601
914913080
10348678441
119090909090
12261535698061
138230246567620
14281241170407093
1510371206370520814
16410525522232055665
1717361641481138401520
18781282469559318055057
1937275544492386193492506
201879498672877297909667781

[1,2,21,204,2605,39990,720601,14913080,348678441,
 9090909090,261535698061,8230246567620,
 281241170407093,10371206370520814,
 410525522232055665,17361641481138401520,
 781282469559318055057,37275544492386193492506,
 1879498672877297909667781]