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A013311 as a simple table

n a(n)
1 1
2 2
3 2
4 12
5 80
6 512
7 4832
8 53872
9 654320
10 9264032
11 147228512
12 2559080832
13 48910122560
14 1017566317952
15 22822627908992
16 550081215323392
17 14178080204748800
18 388900281882678272
19 11314716065658294272

[1,2,2,12,80,512,4832,53872,654320,9264032,
 147228512,2559080832,48910122560,1017566317952,
 22822627908992,550081215323392,14178080204748800,
 388900281882678272,11314716065658294272]

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Last modified March 28 07:33 EDT 2024. Contains 371235 sequences. (Running on oeis4.)