A222744 - OEIS

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A222744 as a simple table

n	a(n)
1	20
2	7546
3	6363724
4	5989744766
5	4906560167364
6	4777709698876890
7	4001484076145095954
8	4007703500495273447052
9	3396887706615718195456805
10	3458279283218841589487839312
11	2953874525277026876992243827814

[20,7546,6363724,5989744766,4906560167364, 4777709698876890,4001484076145095954, 4007703500495273447052,3396887706615718195456805, 3458279283218841589487839312, 2953874525277026876992243827814]