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.

A230681 Number of 7Xn 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).

Table of values

n a(n)
1 0
2 63291
3 53519163
4 42681522741
5 47444197636239
6 51564141085334199
7 55314799986833459367
8 59453762981075686349985
9 63928300225239002685024369

List of values

[0, 63291, 53519163, 42681522741, 47444197636239, 51564141085334199, 55314799986833459367, 59453762981075686349985, 63928300225239002685024369]

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

Content is available under The OEIS End-User License Agreement.