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A216820 as a simple table

na(n)
41
50
62
74
812
932
10110
11340
121209
134272
1416166
1561848
16246660
171004883
184209124
1918020832
2078898047
21352437205
221605225878
237445515638
2435142033027
25168644213617
26822311934788
274071431204506
2820457850555113

[1,0,2,4,12,32,110,340,1209,4272,16166,61848,
 246660,1004883,4209124,18020832,78898047,
 352437205,1605225878,7445515638,35142033027,
 168644213617,822311934788,4071431204506,
 20457850555113]