A135812 - OEIS

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A135812 as a simple table

n	a(n)
0	1
1	0
2	63
3	46466
4	190916733
5	2985028951044
6	139296156465612475
7	16389185827288545027462
8	4296451238117542245438597369
9	2283341354940565366869098996941832

[1,0,63,46466,190916733,2985028951044, 139296156465612475,16389185827288545027462, 4296451238117542245438597369, 2283341354940565366869098996941832]