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A270509 as a simple table

n a(n)
1 0
2 0
3 3
4 0
5 6
6 15
7 0
8 21
9 144
10 126
11 0
12 36
13 1137
14 5406
15 1149
16 0
17 63
18 4584
19 132474
20 369072
21 14220
22 0
23 90
24 15843
25 1522068
26 34889103
27 47829828
28 230247
29 0
30 129
31 40392
32 12034134
33 1489277664
34 22383193638
35 12072484260
36 5038371
37 0
38 168
39 95109
40 65046258

[0,0,3,0,6,15,0,21,144,126,0,36,1137,5406,1149,0,
 63,4584,132474,369072,14220,0,90,15843,1522068,
 34889103,47829828,230247,0,129,40392,12034134,
 1489277664,22383193638,12072484260,5038371,0,168,
 95109,65046258]

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Last modified July 25 09:25 EDT 2024. Contains 374587 sequences. (Running on oeis4.)