A064625 - OEIS

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A064625 as a simple table

n	a(n)
0	1
1	1
2	15
3	1025
4	209135
5	100482849
6	97657699279
7	172687606607425
8	513828770061202095
9	2422699282016359575905
10	17259669919850500726265231
11	178741720937382151333667162241
12	2605965447000176066894638515610735

[1,1,15,1025,209135,100482849,97657699279, 172687606607425,513828770061202095, 2422699282016359575905,17259669919850500726265231, 178741720937382151333667162241, 2605965447000176066894638515610735]