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.

A232078 Number of (2+1) X (n+1) 0..1 arrays with every element equal to some horizontal, diagonal or antidiagonal neighbor, with top left element zero.

Table of values

n a(n)
1 11
2 87
3 520
4 3681
5 26587
6 189404
7 1348429
8 9607995
9 68462448
10 487805049
11 3475683907
12 24764857724
13 176453944877
14 1257264924795
15 8958230513184
16 63828946109201
17 454792310901883
18 3240474086774308
19 23088939844648997

List of values

[11, 87, 520, 3681, 26587, 189404, 1348429, 9607995, 68462448, 487805049, 3475683907, 24764857724, 176453944877, 1257264924795, 8958230513184, 63828946109201, 454792310901883, 3240474086774308, 23088939844648997]

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

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