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.

A303039 Number of nX7 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 21
2 363
3 360
4 2926
5 11079
6 59654
7 345668
8 2060154
9 13122422
10 89037375
11 632329265
12 4677904112
13 35799149696
14 280072132889
15 2226022479526
16 17895152751103
17 144903511517451
18 1178993189869482
19 9624601342853800
20 78735791021587131

List of values

[21, 363, 360, 2926, 11079, 59654, 345668, 2060154, 13122422, 89037375, 632329265, 4677904112, 35799149696, 280072132889, 2226022479526, 17895152751103, 144903511517451, 1178993189869482, 9624601342853800, 78735791021587131]

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

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