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A180994 as a simple table

n a(n)
1 0
2 0
3 1
4 3489
5 5754681
6 15031688395
7 85146473995739
8 1221835613883859705
9 48879331646085761019504
10 5817604509321397715670886548
11 2157782748250229924192241839158932

[0,0,1,3489,5754681,15031688395,85146473995739,
 1221835613883859705,48879331646085761019504,
 5817604509321397715670886548,
 2157782748250229924192241839158932]

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Last modified March 29 11:45 EDT 2024. Contains 371278 sequences. (Running on oeis4.)