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A227490 as a simple table

na(n)
1666
235325
3412443
43099663
519013175
6104225031
7533102247
82604327399
912319287399
1056913753447
11258258898791
121155566158695
135112617020263
1422412337970023
1597497752214375
16421386451835751
171811131262622567
187746874238425959

[666,35325,412443,3099663,19013175,104225031,
 533102247,2604327399,12319287399,56913753447,
 258258898791,1155566158695,5112617020263,
 22412337970023,97497752214375,421386451835751,
 1811131262622567,7746874238425959]