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.

A198909 Number of nX3 0..7 arrays with values 0..7 introduced in row major order and no element equal to any horizontal or vertical neighbor.

Table of values

n a(n)
1 2
2 34
3 2051
4 269940
5 54381563
6 13088156547
7 3352514013159
8 876632051686733
9 230783525290600476
10 60892298359864756053
11 16078352442288906898825
12 4246466444504000973551502
13 1121629692628918068552449185

List of values

[2, 34, 2051, 269940, 54381563, 13088156547, 3352514013159, 876632051686733, 230783525290600476, 60892298359864756053, 16078352442288906898825, 4246466444504000973551502, 1121629692628918068552449185]

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

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