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A180255 as a simple table

n a(n)
0 0
1 1
2 6
3 57
4 916
5 22905
6 824586
7 40404721
8 2585902152
9 209458074321
10 20945807432110
11 2534442699285321
12 364959748697086236
13 61678197529807573897
14 12088926715842284483826
15 2720008511064514008860865

[0,1,6,57,916,22905,824586,40404721,2585902152,
 209458074321,20945807432110,2534442699285321,
 364959748697086236,61678197529807573897,
 12088926715842284483826,2720008511064514008860865]

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Last modified June 2 18:17 EDT 2020. Contains 334787 sequences. (Running on oeis4.)