A172824 - OEIS

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A172824 as a simple table

n	a(n)
1	0
2	19
3	805231
4	744168838420
5	7608443835495995100
6	594239211348093910990313341
7	269741028364409749133570268559118335
8	576542290820108436100865963035873493286055960

[0,19,805231,744168838420,7608443835495995100, 594239211348093910990313341, 269741028364409749133570268559118335, 576542290820108436100865963035873493286055960]