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A099866 as a simple table

na(n)
11
22
31
43
54
620
75
835
956
10504
1170
12770
133960
141144
151001
1645045
1780080
181361360
19204204
20184756
2167184
22470288
23323323
247436429
2527457584
26228813200
27106234700
282868336900
29356948592
3010351509168
31145568097675
3245581929575
3385801279200

[1,2,1,3,4,20,5,35,56,504,70,770,3960,1144,1001,
 45045,80080,1361360,204204,184756,67184,470288,
 323323,7436429,27457584,228813200,106234700,
 2868336900,356948592,10351509168,145568097675,
 45581929575,85801279200]