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A149417 as a simple table

n a(n)
0 1
1 1
2 4
3 12
4 54
5 203
6 913
7 3791
8 17421
9 76369
10 357010
11 1610906
12 7618852
13 35049764
14 167219609
15 780154851
16 3746904339
17 17660665005
18 85252847312
19 405012623438
20 1962958881010
21 9384294780340
22 45630045874621
23 219250204141161
24 1068911354389637
25 5157484620366595
26 25199960350383735
27 122013300433826613

[1,1,4,12,54,203,913,3791,17421,76369,357010,
 1610906,7618852,35049764,167219609,780154851,
 3746904339,17660665005,85252847312,405012623438,
 1962958881010,9384294780340,45630045874621,
 219250204141161,1068911354389637,5157484620366595,
 25199960350383735,122013300433826613]

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Last modified February 25 13:12 EST 2024. Contains 370330 sequences. (Running on oeis4.)