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A149415 as a simple table

n a(n)
0 1
1 1
2 4
3 12
4 54
5 184
6 868
7 3270
8 15789
9 62535
10 305725
11 1250467
12 6158414
13 25763798
14 127467985
15 542192997
16 2690596202
17 11591354117
18 57638344104
19 250831973091
20 1249036545289
21 5480410135621
22 27317663458062
23 120682044327008
24 601992919806603
25 2674803141963889
26 13349816992232726
27 59610044516852108

[1,1,4,12,54,184,868,3270,15789,62535,305725,
 1250467,6158414,25763798,127467985,542192997,
 2690596202,11591354117,57638344104,250831973091,
 1249036545289,5480410135621,27317663458062,
 120682044327008,601992919806603,2674803141963889,
 13349816992232726,59610044516852108]

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Last modified March 28 08:12 EDT 2024. Contains 371236 sequences. (Running on oeis4.)