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A140884 as a simple table

n a(n)
1 1
2 1
3 1
4 4
5 3
6 13
7 43
8 580
9 1897
10 23851
11 149041
12 14348161
13 74552521
14 7849966951
15 311500453881
16 64690704744716
17 2466747100788601
18 493809829542170401

[1,1,1,4,3,13,43,580,1897,23851,149041,14348161,
 74552521,7849966951,311500453881,64690704744716,
 2466747100788601,493809829542170401]

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Last modified June 30 18:15 EDT 2022. Contains 354945 sequences. (Running on oeis4.)