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A140638 as a simple table

n a(n)
1 0
2 0
3 0
4 7
5 381
6 21748
7 1781154
8 249849880
9 66257728763
10 34495508486976
11 35641629989151608
12 73354595357480683904
13 301272202621204113362497
14 2471648811029413368450098688
15 40527680937730440155535277704046
16 1328578958335783199341353852258282496

[0,0,0,7,381,21748,1781154,249849880,66257728763,
 34495508486976,35641629989151608,
 73354595357480683904,301272202621204113362497,
 2471648811029413368450098688,
 40527680937730440155535277704046,
 1328578958335783199341353852258282496]

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Last modified April 28 04:07 EDT 2024. Contains 372020 sequences. (Running on oeis4.)