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A306715 as a simple table

n a(n)
1 1
2 0
3 2
4 12
5 204
6 5372
7 299592
8 33546240
9 7635496960
10 3518433853392
11 3275345183542176
12 6148914685509544960
13 23248573454127484128960
14 176848577040728399988915648
15 2704321280486889389857342715776
16 83076749736557240903566436660674560

[1,0,2,12,204,5372,299592,33546240,7635496960,
 3518433853392,3275345183542176,
 6148914685509544960,23248573454127484128960,
 176848577040728399988915648,
 2704321280486889389857342715776,
 83076749736557240903566436660674560]

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Last modified June 3 03:48 EDT 2024. Contains 373054 sequences. (Running on oeis4.)