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A111758 as a simple table

n a(n)
1 1
2 1
3 1
4 3
5 4
6 12
7 24
8 74
9 193
10 635
11 1990
12 6933
13 24144
14 88203
15 326053
16 1234735
17 4732762
18 18403211
19 72282202
20 286705378

[1,1,1,3,4,12,24,74,193,635,1990,6933,24144,88203,
 326053,1234735,4732762,18403211,72282202,
 286705378]

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Last modified December 7 05:14 EST 2019. Contains 329839 sequences. (Running on oeis4.)