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.

A302312 Number of 4Xn 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 8
2 10
3 33
4 66
5 194
6 663
7 2048
8 5790
9 17761
10 58980
11 191180
12 596347
13 1907378
14 6288532
15 20577053
16 66405860
17 215990588
18 709815637
19 2327287890
20 7595046870
21 24844917677
22 81549601926
23 267490606860
24 876047158691
25 2871110160412
26 9420069102786

List of values

[8, 10, 33, 66, 194, 663, 2048, 5790, 17761, 58980, 191180, 596347, 1907378, 6288532, 20577053, 66405860, 215990588, 709815637, 2327287890, 7595046870, 24844917677, 81549601926, 267490606860, 876047158691, 2871110160412, 9420069102786]

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

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