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A005406 as a simple table

na(n)
11
23
36
413
525
649
791
8170
9309
10558
11992
121752
133062
145317
159166
1615712
1726784
1845447
1976775
20129203
21216662
22362177
23603671
241003566
251664389
262754382
274549207
287500096
2912344840
3020288723
3133298979
3254584077
3389373081
34146182754

[1,3,6,13,25,49,91,170,309,558,992,1752,3062,5317,
 9166,15712,26784,45447,76775,129203,216662,362177,
 603671,1003566,1664389,2754382,4549207,7500096,
 12344840,20288723,33298979,54584077,89373081,
 146182754]