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.

A303471 Number of 4Xn 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 8
2 128
3 1033
4 9110
5 79377
6 692636
7 6051850
8 52846843
9 461529362
10 4030762937
11 35202137794
12 307434409358
13 2684948462398
14 23448727446524
15 204787130200395
16 1788488024787439
17 15619582094687097
18 136412065575277095

List of values

[8, 128, 1033, 9110, 79377, 692636, 6051850, 52846843, 461529362, 4030762937, 35202137794, 307434409358, 2684948462398, 23448727446524, 204787130200395, 1788488024787439, 15619582094687097, 136412065575277095]

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

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