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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.

A292691 a(n) = C(A001359(n)), n >= 1, with C(n) = (4*((n-1)! + 1) + n)/(n*(n+2)) for n >= 2.

Table of values

n a(n)
1 1
2 3
3 101505
4 259105757127
5 1356566605613854774200240267
6 1851197466245939272480116323530608949000567215

List of values

[1, 3, 101505, 259105757127, 1356566605613854774200240267, 1851197466245939272480116323530608949000567215]

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

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