A281690 - OEIS

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A281690 as a simple table

n	a(n)
1	0
2	6
3	847
4	19326
5	293814
6	3714629
7	42265965
8	449985840
9	4571830360
10	44873281735
11	428836383879
12	4011945910730
13	36886705974618
14	334269681986457
15	2992281836910513
16	26505969364372244
17	232662102182106796

[0,6,847,19326,293814,3714629,42265965,449985840, 4571830360,44873281735,428836383879,4011945910730, 36886705974618,334269681986457,2992281836910513, 26505969364372244,232662102182106796]