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A000315 as a simple table

n a(n)
1 1
2 1
3 1
4 4
5 56
6 9408
7 16942080
8 535281401856
9 377597570964258816
10 7580721483160132811489280
11 5363937773277371298119673540771840

[1,1,1,4,56,9408,16942080,535281401856,
 377597570964258816,7580721483160132811489280,
 5363937773277371298119673540771840]

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Last modified December 22 02:57 EST 2014. Contains 252326 sequences.