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.

A302214 Number of 4 X n 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 8
2 3
3 47
4 7
5 111
6 80
7 424
8 1157
9 2922
10 12816
11 33744
12 135689
13 427777
14 1511455
15 5237154
16 17740921
17 62498339
18 212645123
19 742064542
20 2553096441
21 8837428284
22 30568037684
23 105553660977
24 365371090457
25 1262061403870
26 4365797662037
27 15090331846613

List of values

[8, 3, 47, 7, 111, 80, 424, 1157, 2922, 12816, 33744, 135689, 427777, 1511455, 5237154, 17740921, 62498339, 212645123, 742064542, 2553096441, 8837428284, 30568037684, 105553660977, 365371090457, 1262061403870, 4365797662037, 15090331846613]

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

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