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A009668 as a simple table

na(n)
01
14
232
3432
410752
5504832
635418112
73115462656
8333569720320
944698511474688
107574890049699840
111575934549490139136
12387157222106970718208
13110017544405171642040320

[1,4,32,432,10752,504832,35418112,3115462656,
 333569720320,44698511474688,7574890049699840,
 1575934549490139136,387157222106970718208,
 110017544405171642040320]