A180330 - OEIS

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A180330 as a simple table

n	a(n)
2	2620
3	10744
4	66928
5	2082464
6	7677248
7	1750776704
8	749380864
9	7074650624
10	25937232896
11	161899964416
12	3949032574976
13	56691934109696
14	162222327218176
15	5469697508737024
16	21547979005558784
17	48336727662002176

[2620,10744,66928,2082464,7677248,1750776704, 749380864,7074650624,25937232896,161899964416, 3949032574976,56691934109696,162222327218176, 5469697508737024,21547979005558784, 48336727662002176]