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.

A282992 Number of n X 4 0..1 arrays with no 1 equal to more than one of its horizontal and vertical neighbors.

Table of values

n a(n)
1 13
2 98
3 803
4 6547
5 53389
6 435027
7 3546870
8 28911809
9 235681253
10 1921212987
11 15661161199
12 127665372304
13 1040691953095
14 8483425185009
15 69154476414585
16 563727672983607
17 4595348063993330
18 37459973798636833
19 305363079492664703
20 2489233196683020273
21 20291522858244231419

List of values

[13, 98, 803, 6547, 53389, 435027, 3546870, 28911809, 235681253, 1921212987, 15661161199, 127665372304, 1040691953095, 8483425185009, 69154476414585, 563727672983607, 4595348063993330, 37459973798636833, 305363079492664703, 2489233196683020273, 20291522858244231419]

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

Content is available under The OEIS End-User License Agreement.