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.

A232371 Number of nX3 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, diagonally or antidiagonally, and no adjacent values equal.

Table of values

n a(n)
1 4
2 74
3 586
4 4550
5 36574
6 292122
7 2324142
8 18574882
9 148225606
10 1182879814
11 9441116934
12 75346596778
13 601334070966
14 4799220047514
15 38302112010658
16 305686073938078
17 2439655331781498
18 19470682813562030
19 155393901867403394

List of values

[4, 74, 586, 4550, 36574, 292122, 2324142, 18574882, 148225606, 1182879814, 9441116934, 75346596778, 601334070966, 4799220047514, 38302112010658, 305686073938078, 2439655331781498, 19470682813562030, 155393901867403394]

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

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