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.

A190945 Number of permutations of the n*(n+1)/2 numbers (i copies of i | i=1..n), with no element equal to another within a distance of 1.

Table of values

n a(n)
1 1
2 1
3 10
4 1074
5 1637124
6 45156692400
7 27230193578558160
8 420296434943941609215120
9 190200071567439616748736269178720
10 2843464512159537301384360263178682136716160
11 1562137388408002436396705025296003247844758163480828800

List of values

[1, 1, 10, 1074, 1637124, 45156692400, 27230193578558160, 420296434943941609215120, 190200071567439616748736269178720, 2843464512159537301384360263178682136716160, 1562137388408002436396705025296003247844758163480828800]

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

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