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.

A269140 Number of nX5 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three no more than once.

Table of values

n a(n)
1 756
2 59916
3 3924212
4 240647068
5 14197016484
6 815458664276
7 45920055321732
8 2546667557472940
9 139535357045338964
10 7570570235882777884
11 407418697407850105348
12 21776207050517593512788
13 1157149832292866826527492

List of values

[756, 59916, 3924212, 240647068, 14197016484, 815458664276, 45920055321732, 2546667557472940, 139535357045338964, 7570570235882777884, 407418697407850105348, 21776207050517593512788, 1157149832292866826527492]

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

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