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.

A233195 Number of n X n 0..7 arrays with no element x(i,j) adjacent to itself or value 7-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 4 5 and 6, 2 appearing before 3 4 and 5, and 3 appearing before 4 in row major order (unlabelled 8-colorings with no clashing color pairs).

Table of values

n a(n)
1 1
2 3
3 1440
4 7802880
5 352524959744
6 132364161848967168
7 416547612309880393695232
8 11042955940877644659574580445184
9 2474201164323675429580723288914257772544

List of values

[1, 3, 1440, 7802880, 352524959744, 132364161848967168, 416547612309880393695232, 11042955940877644659574580445184, 2474201164323675429580723288914257772544]

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

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