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.

A269203 Number of 3 X n 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.

Table of values

n a(n)
1 64
2 1740
3 25572
4 400428
5 5877228
6 84310620
7 1184381844
8 16385570076
9 223935582828
10 3030348558252
11 40673437553748
12 542180347359564
13 7185077761974828
14 94737850175764476
15 1243661129422894356
16 16262904060512571516
17 211935250795961093868
18 2753454797480878594380

List of values

[64, 1740, 25572, 400428, 5877228, 84310620, 1184381844, 16385570076, 223935582828, 3030348558252, 40673437553748, 542180347359564, 7185077761974828, 94737850175764476, 1243661129422894356, 16262904060512571516, 211935250795961093868, 2753454797480878594380]

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

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