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.

A208304 Number of 4 X n nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or antidiagonal neighbor (colorings ignoring permutations of colors).

Table of values

n a(n)
0 1
1 15
2 877
3 433252
4 656404264
5 2227156082842
6 14216420563705724
7 152834703739876070716
8 2562708954761302163168116
9 63338792205478132108785337770
10 2209363673047740561377241754826088
11 105080298194482216982100203776114994146
12 6626004995903793205763315247117544349120572

List of values

[1, 15, 877, 433252, 656404264, 2227156082842, 14216420563705724, 152834703739876070716, 2562708954761302163168116, 63338792205478132108785337770, 2209363673047740561377241754826088, 105080298194482216982100203776114994146, 6626004995903793205763315247117544349120572]

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

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