cp's OEIS Frontend

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.

A318790 One-half of the number of permutations sigma of {1,2,...,n^2 + 1} such that |sigma(i+j)-sigma(i)| >= n for 1 <= i <= n^2 + 1 - j, 1 <= j <= n - 1.

Table of values

n a(n)
1 1
2 7
3 20
4 37
5 64
6 109

List of values

[1, 7, 20, 37, 64, 109]

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

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