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.

A302879 Number of 4Xn 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 8
2 10
3 37
4 95
5 306
6 1442
7 5871
8 21832
9 89400
10 411068
11 1770984
12 7282331
13 31250009
14 139497681
15 604440671
16 2568314200
17 11116864094
18 48801680753
19 211521061837
20 909708854837
21 3943937945239
22 17186537187421
23 74492402195670

List of values

[8, 10, 37, 95, 306, 1442, 5871, 21832, 89400, 411068, 1770984, 7282331, 31250009, 139497681, 604440671, 2568314200, 11116864094, 48801680753, 211521061837, 909708854837, 3943937945239, 17186537187421, 74492402195670]

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

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