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A012075 as a simple table

n a(n)
0 1
1 1
2 1
3 4
4 13
5 76
6 421
7 3424
8 26713
9 285136
10 2871241
11 38302144
12 473357413
13 7603381696
14 111506036461
15 2097552753664
16 35624155784113
17 768471264000256
18 14838126699784081
19 361133162545705984

[1,1,1,4,13,76,421,3424,26713,285136,2871241,
 38302144,473357413,7603381696,111506036461,
 2097552753664,35624155784113,768471264000256,
 14838126699784081,361133162545705984]

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Last modified January 21 17:55 EST 2022. Contains 350479 sequences. (Running on oeis4.)