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A264759 as a simple table

na(n)
10
20
31
41
52
63
710
827
9101
10364
111610
127202
1334659
14170692
15864590
164463287
1723415443
18124526110
19670224294
203644907768
2120011145443
22110794212315
23618187581204

[0,0,1,1,2,3,10,27,101,364,1610,7202,34659,170692,
 864590,4463287,23415443,124526110,670224294,
 3644907768,20011145443,110794212315,618187581204]