A281657 - OEIS

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A281657 as a simple table

n	a(n)
1	0
2	2894
3	104815
4	2159590
5	48871479
6	955490042
7	18092139475
8	334914604224
9	6058290906233
10	107920205083282
11	1899220467260750
12	33088963050484262
13	571760413613053121
14	9811548539803374962
15	167377398458564403677

[0,2894,104815,2159590,48871479,955490042, 18092139475,334914604224,6058290906233, 107920205083282,1899220467260750, 33088963050484262,571760413613053121, 9811548539803374962,167377398458564403677]