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A011812 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 1
5 57
6 2185
7 72881
8 2322629
9 73949186
10 2410067138
11 81563004129
12 2892108485341
13 108078014350565
14 4273605661408932
15 179311027612775138
16 7999342346440002428
17 379986003510210048053
18 19238835001520254448553

[0,0,0,0,1,57,2185,72881,2322629,73949186,
 2410067138,81563004129,2892108485341,
 108078014350565,4273605661408932,
 179311027612775138,7999342346440002428,
 379986003510210048053,19238835001520254448553]

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Last modified November 24 04:46 EST 2020. Contains 338607 sequences. (Running on oeis4.)