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A190656 as a simple table

na(n)
11
21
31
42
55
620
786
8486
93495
1031938
11368832
125412981
13100924470
142390092072
1571686035608
162726514241955
17131508854502755
188039052200861454
19622678408143680652

[1,1,1,2,5,20,86,486,3495,31938,368832,5412981,
 100924470,2390092072,71686035608,2726514241955,
 131508854502755,8039052200861454,
 622678408143680652]