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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A094577 Central Peirce numbers. Number of set partitions of {1,2,..,2n+1} in which n+1 is the smallest of its block.

Table of values

n a(n)
0 1
1 3
2 27
3 409
4 9089
5 272947
6 10515147
7 501178937
8 28773452321
9 1949230218691
10 153281759047387
11 13806215066685433
12 1408621900803060705
13 161278353358629226675
14 20555596673435403499083
15 2896227959507289559616217
16 448371253145121338801335489

List of values

[1, 3, 27, 409, 9089, 272947, 10515147, 501178937, 28773452321, 1949230218691, 153281759047387, 13806215066685433, 1408621900803060705, 161278353358629226675, 20555596673435403499083, 2896227959507289559616217, 448371253145121338801335489]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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