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A002465 as a simple table

n a(n)
1 1
2 4
3 26
4 260
5 3368
6 53744
7 1022320
8 22522960
9 565532992
10 15915225216
11 496911749920
12 17029582652416
13 636101065346560
14 25705530908501760
15 1118038500044633088
16 52054862490790200576
17 2584158975023147147264

[1,4,26,260,3368,53744,1022320,22522960,565532992,
 15915225216,496911749920,17029582652416,
 636101065346560,25705530908501760,
 1118038500044633088,52054862490790200576,
 2584158975023147147264]

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Last modified April 12 01:36 EDT 2021. Contains 342912 sequences. (Running on oeis4.)