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A216447 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 19
5 64
6 228
7 841
8 3181
9 12277
10 48156
11 191400
12 769168
13 3120044
14 12758080
15 52533265
16 217637308
17 906511243
18 3793989118
19 15947205096
20 67290484581
21 284934164506
22 1210374907352
23 5156562941596
24 22027291990432
25 94325712634264
26 404842107811880

[1,1,2,6,19,64,228,841,3181,12277,48156,191400,
 769168,3120044,12758080,52533265,217637308,
 906511243,3793989118,15947205096,67290484581,
 284934164506,1210374907352,5156562941596,
 22027291990432,94325712634264,404842107811880]

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Last modified September 28 01:20 EDT 2020. Contains 337388 sequences. (Running on oeis4.)