A226667 - OEIS

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A226667 as a simple table

n	a(n)
1	1
2	3397
3	2277097
4	106035623
5	128946539
6	153247321
7	885327131
8	6372904817
9	52894692341
10	95712964765
11	301829916841
12	1846456176103
13	2697688935023
14	10281192195005
15	10556691785131
16	13239192635131

[1,3397,2277097,106035623,128946539,153247321, 885327131,6372904817,52894692341,95712964765, 301829916841,1846456176103,2697688935023, 10281192195005,10556691785131,13239192635131]