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.

A208098 Number of 3 X n nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal, diagonal or antidiagonal neighbor (colorings ignoring permutations of colors).

Table of values

n a(n)
0 1
1 5
2 34
3 1573
4 169064
5 34438557
6 11535531783
7 5804338800147
8 4121852595871393
9 3947133396896179889
10 4923290609971869799119
11 7783034938833777039389506
12 15253558021465456746321690675
13 36391805974300638618769192592189
14 104086634920105554145003030677202100

List of values

[1, 5, 34, 1573, 169064, 34438557, 11535531783, 5804338800147, 4121852595871393, 3947133396896179889, 4923290609971869799119, 7783034938833777039389506, 15253558021465456746321690675, 36391805974300638618769192592189, 104086634920105554145003030677202100]

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

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