A115473 - OEIS

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A115473 as a simple table

n	a(n)
1	1
2	35
3	903
4	32271
5	2095135
6	268427327
7	68719444095
8	35184371958015
9	36028797018440191
10	73786976294836110335
11	302231454903657285289983
12	2475880078570760549764698111
13	40564819207303340847894368362495

[1,35,903,32271,2095135,268427327,68719444095, 35184371958015,36028797018440191, 73786976294836110335,302231454903657285289983, 2475880078570760549764698111, 40564819207303340847894368362495]