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A006412 as a simple table

na(n)
14
275
3604
43150
512480
640788
7115500
8292578
9677820
101459315
112954952
125679700
1310438272
1418449760
1531511880
1652213596
1784206100
18132543411
19204105220
20308116050
21456776320
22666022500
23956435220
241354315950
251892954700
262614113099
273569749200
284824012424

[4,75,604,3150,12480,40788,115500,292578,677820,
 1459315,2954952,5679700,10438272,18449760,
 31511880,52213596,84206100,132543411,204105220,
 308116050,456776320,666022500,956435220,
 1354315950,1892954700,2614113099,3569749200,
 4824012424]