A254495 - OEIS

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A254495 as a simple table

n	a(n)
1	660480
2	21641920
3	640020096
4	20457240960
5	615887502592
6	18812857512320
7	566704583699968
8	17139805682909312
9	515235032546818816
10	15544467915423093120
11	467857407183835369472
12	14104143870551705257088

[660480,21641920,640020096,20457240960, 615887502592,18812857512320,566704583699968, 17139805682909312,515235032546818816, 15544467915423093120,467857407183835369472, 14104143870551705257088]