A278891 - OEIS

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A278891 as a simple table

n	a(n)
1	0
2	161
3	52424
4	6888340
5	518626568
6	27351484380
7	1123462079180
8	38208069702548
9	1117773552649752
10	28854012889071265
11	669117722718849452
12	14125545954412619268
13	274254133053070192532
14	4937202122626940281323

[0,161,52424,6888340,518626568,27351484380, 1123462079180,38208069702548,1117773552649752, 28854012889071265,669117722718849452, 14125545954412619268,274254133053070192532, 4937202122626940281323]