A132688 - OEIS

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A132688 as a simple table

n	a(n)
0	1
1	5
2	45
3	680
4	20475
5	1533939
6	350161812
7	280384608504
8	847073824772175
9	9894081531608130857
10	446730013630787463700695
11	77328499046923986969058944720
12	50891283683781760304442885961988100

[1,5,45,680,20475,1533939,350161812,280384608504, 847073824772175,9894081531608130857, 446730013630787463700695, 77328499046923986969058944720, 50891283683781760304442885961988100]