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A066315 as a simple table

n a(n)
1 1
2 1
3 3
4 7
5 20
6 51
7 154
8 460
9 1476
10 4860
11 16544
12 57321
13 202059
14 720370
15 2593470
16 9408000
17 34350506
18 126108252
19 465200332
20 1723341185
21 6408356052
22 23911255544
23 89495909408
24 335916703284
25 1264114452975
26 4768464107355

[1,1,3,7,20,51,154,460,1476,4860,16544,57321,
 202059,720370,2593470,9408000,34350506,126108252,
 465200332,1723341185,6408356052,23911255544,
 89495909408,335916703284,1264114452975,
 4768464107355]

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Last modified March 29 05:16 EDT 2024. Contains 371264 sequences. (Running on oeis4.)