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A042271 as a simple table

n a(n)
0 1
1 1
2 3
3 7
4 31
5 131
6 2127
7 2258
8 22449
9 47156
10 69605
11 882416
12 4481685
13 5364101
14 9845786
15 15209887
16 40265560
17 55475447
18 206691901
19 262167348
20 468859249
21 1668745095
22 2137604344
23 5943953783
24 8081558127
25 14025511910
26 22107070037
27 124560862095
28 1516837415177

[1,1,3,7,31,131,2127,2258,22449,47156,69605,
 882416,4481685,5364101,9845786,15209887,40265560,
 55475447,206691901,262167348,468859249,1668745095,
 2137604344,5943953783,8081558127,14025511910,
 22107070037,124560862095,1516837415177]

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Last modified March 29 11:14 EDT 2024. Contains 371278 sequences. (Running on oeis4.)