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A054883 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 6
6 12
7 84
8 192
9 882
10 2220
11 8448
12 22704
13 78078
14 218988
15 710892
16 2048256
17 6430794
18 18837516
19 58008216
20 171619248
21 522598230
22 1555243404
23 4705481220
24 14051590080
25 42357719586
26 126740502252
27 381253030704
28 1142062255152
29 3431411494062

[0,0,0,0,0,6,12,84,192,882,2220,8448,22704,78078,
 218988,710892,2048256,6430794,18837516,58008216,
 171619248,522598230,1555243404,4705481220,
 14051590080,42357719586,126740502252,381253030704,
 1142062255152,3431411494062]

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Last modified May 17 14:19 EDT 2022. Contains 353746 sequences. (Running on oeis4.)