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A027015 as a simple table

n a(n)
4 1
5 12
6 343
7 3864
8 26990
9 140455
10 599801
11 2228414
12 7486615
13 23370193
14 69141497
15 196766283
16 544680787
17 1478898009
18 3962865228
19 10526310127
20 27802386717
21 73170829088
22 192150938490
23 503938185601
24 1320621962194
25 3459303317894
26 9059231670566
27 23721098636714

[1,12,343,3864,26990,140455,599801,2228414,
 7486615,23370193,69141497,196766283,544680787,
 1478898009,3962865228,10526310127,27802386717,
 73170829088,192150938490,503938185601,
 1320621962194,3459303317894,9059231670566,
 23721098636714]

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Last modified May 29 00:29 EDT 2024. Contains 372921 sequences. (Running on oeis4.)