A231595 - OEIS

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A231595 as a simple table

n	a(n)
1	0
2	2
3	33
4	369
5	3741
6	38714
7	395621
8	4007705
9	40484195
10	408035120
11	4105718243
12	41266320918
13	414416274953
14	4159068898063

[0,2,33,369,3741,38714,395621,4007705,40484195, 408035120,4105718243,41266320918,414416274953, 4159068898063]