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A327681 as a simple table

n a(n)
0 1
1 1
2 21
3 619
4 32621
5 2619031
6 298688151
7 45747815408
8 9130881915237
9 2302153903685914
10 716914926484850891
11 270654298469985496639
12 121905995767297357401683
13 64616493201145984241278851
14 39838866068219563302546530228
15 28277347692301453998991014108124

[1,1,21,619,32621,2619031,298688151,45747815408,
 9130881915237,2302153903685914,716914926484850891,
 270654298469985496639,121905995767297357401683,
 64616493201145984241278851,
 39838866068219563302546530228,
 28277347692301453998991014108124]

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Last modified January 22 23:09 EST 2021. Contains 340383 sequences. (Running on oeis4.)