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.

A303043 Number of 5Xn 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 16
2 21
3 71
4 197
5 703
6 3069
7 11079
8 39281
9 147655
10 574771
11 2154055
12 8024515
13 30383341
14 115990813
15 439167167
16 1658045069
17 6291314637
18 23940047265
19 90892145957
20 344679542151
21 1309322301315
22 4979238288779
23 18921620186225

List of values

[16, 21, 71, 197, 703, 3069, 11079, 39281, 147655, 574771, 2154055, 8024515, 30383341, 115990813, 439167167, 1658045069, 6291314637, 23940047265, 90892145957, 344679542151, 1309322301315, 4979238288779, 18921620186225]

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

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