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A278553 as a simple table

n a(n)
1 0
2 0
3 0
4 4
5 70
6 4
7 65
8 1531
9 1531
10 65
11 456
12 25402
13 124564
14 25402
15 456
16 2128
17 385040
18 6207774
19 6207774
20 385040
21 2128
22 7728
23 4880813
24 256173362
25 1116456061
26 256173362
27 4880813
28 7728
29 23607
30 50476458
31 9647190761
32 157222953688
33 157222953688

[0,0,0,4,70,4,65,1531,1531,65,456,25402,124564,
 25402,456,2128,385040,6207774,6207774,385040,2128,
 7728,4880813,256173362,1116456061,256173362,
 4880813,7728,23607,50476458,9647190761,
 157222953688,157222953688]

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Last modified December 8 05:26 EST 2021. Contains 349590 sequences. (Running on oeis4.)