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A263761 as a simple table

n a(n)
1 0
2 0
3 1
4 4
5 31
6 146
7 961
8 3662
9 18444
10 69848
11 326102
12 1330424
13 6299674
14 26712358
15 124560630
16 533971782
17 2439626795
18 10546384942
19 47745529864
20 208543550082
21 940653815829
22 4138965244350
23 18611240779758
24 82249270808254

[0,0,1,4,31,146,961,3662,18444,69848,326102,
 1330424,6299674,26712358,124560630,533971782,
 2439626795,10546384942,47745529864,208543550082,
 940653815829,4138965244350,18611240779758,
 82249270808254]

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Last modified June 26 23:24 EDT 2022. Contains 354885 sequences. (Running on oeis4.)