A028692 - OEIS

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A028692 as a simple table

n	a(n)
0	1
1	22
2	11616
3	141320256
4	39547060439040
5	254538406080331591680
6	37680818974206486508802211840
7	128296611269497862923425473853914480640
8	10047034036599529256387830050150921763777884979200

[1,22,11616,141320256,39547060439040, 254538406080331591680, 37680818974206486508802211840, 128296611269497862923425473853914480640, 10047034036599529256387830050150921763777884979200\ ]