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A026070 as a simple table

n a(n)
3 1
4 2
5 8
6 24
7 76
8 232
9 707
10 2136
11 6429
12 19282
13 57695
14 172316
15 513955
16 1531362
17 4559271
18 13566288
19 40349619
20 119972214
21 356634978
22 1059985776
23 3150165270
24 9361450868
25 27819215185
26 82670528056
27 245680350995
28 730149455646
29 2170105711452

[1,2,8,24,76,232,707,2136,6429,19282,57695,172316,
 513955,1531362,4559271,13566288,40349619,
 119972214,356634978,1059985776,3150165270,
 9361450868,27819215185,82670528056,245680350995,
 730149455646,2170105711452]

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Last modified March 28 16:58 EDT 2024. Contains 371254 sequences. (Running on oeis4.)