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A288411 as a simple table

na(n)
1257
2271
31201
410651
5135391
6316234143481
749988475139107080748861383849035044804037186461213252284425520655249250725695020643146597883951938106998443603515881

[257,271,1201,10651,135391,316234143481,
 49988475139107080748861383849035044804037186461213\
 25228442552065524925072569502064314659788395193810\
 6998443603515881]