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.

A230188 Number of 5Xn 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value 2-x(i,j).

Table of values

n a(n)
1 0
2 513
3 16815
4 1603431
5 133265847
6 11393567289
7 967087903539
8 82226647665621
9 6988859258823513
10 594060143921819223
11 50495027179295395167
12 4292081456142986073615
13 364827090034511080822419

List of values

[0, 513, 16815, 1603431, 133265847, 11393567289, 967087903539, 82226647665621, 6988859258823513, 594060143921819223, 50495027179295395167, 4292081456142986073615, 364827090034511080822419]

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

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