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A335786 as a simple table

n a(n)
1 1
2 2
3 12
4 72
5 570
6 6420
7 73710
8 1062880
9 16152192
10 295701840
11 5972551200
12 142376439744
13 3404745197568
14 93970796984064
15 2607611074548480
16 81965344295577600
17 2592539062735564800
18 91576434008178662400
19 3254436161821209530880
20 127719736848201606451200

[1,2,12,72,570,6420,73710,1062880,16152192,
 295701840,5972551200,142376439744,3404745197568,
 93970796984064,2607611074548480,81965344295577600,
 2592539062735564800,91576434008178662400,
 3254436161821209530880,127719736848201606451200]

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Last modified May 22 09:50 EDT 2022. Contains 353949 sequences. (Running on oeis4.)