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.

A240786 Number of 5Xn 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.

Table of values

n a(n)
1 16
2 111
3 459
4 2167
5 10150
6 47920
7 226532
8 1071982
9 5074441
10 24028807
11 113785341
12 538857251
13 2551907524
14 12085420318
15 57234822524
16 271056496272
17 1283688860005
18 6079388685605
19 28791225250367
20 136351659911471
21 645744522623364

List of values

[16, 111, 459, 2167, 10150, 47920, 226532, 1071982, 5074441, 24028807, 113785341, 538857251, 2551907524, 12085420318, 57234822524, 271056496272, 1283688860005, 6079388685605, 28791225250367, 136351659911471, 645744522623364]

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

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