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A261937 as a simple table

na(n)
10
22
35
412
531
657
7112
8296
9833
101889
115015
1211625
1330782
1480154
15202448
16526705
171410549
183698903

[0,2,5,12,31,57,112,296,833,1889,5015,11625,30782,
 80154,202448,526705,1410549,3698903]