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.

A302873 Number of nX4 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 5
2 21
3 35
4 95
5 285
6 858
7 2938
8 11126
9 44216
10 186565
11 819633
12 3681703
13 16781413
14 77160382
15 356502109
16 1651886591
17 7666887125
18 35617442101
19 165553926866
20 769750431744
21 3579614404889
22 16648148072359
23 77431993155630

List of values

[5, 21, 35, 95, 285, 858, 2938, 11126, 44216, 186565, 819633, 3681703, 16781413, 77160382, 356502109, 1651886591, 7666887125, 35617442101, 165553926866, 769750431744, 3579614404889, 16648148072359, 77431993155630]

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

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