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.

A302881 Number of 6Xn 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 32
2 42
3 209
4 858
5 4849
6 45897
7 359518
8 2795440
9 24612087
10 229678996
11 2033049729
12 17595489212
13 158734355515
14 1457646451815
15 13060861095622
16 115840845731074
17 1044452206802108
18 9479995763726021
19 85151645686087391
20 761720310814435390

List of values

[32, 42, 209, 858, 4849, 45897, 359518, 2795440, 24612087, 229678996, 2033049729, 17595489212, 158734355515, 1457646451815, 13060861095622, 115840845731074, 1044452206802108, 9479995763726021, 85151645686087391, 761720310814435390]

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

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