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.

A205155 Number of n X n 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..3 introduced in row major order.

Table of values

n a(n)
1 1
2 15
3 6941
4 54314298
5 4826926610498
6 4948963310952700521

List of values

[1, 15, 6941, 54314298, 4826926610498, 4948963310952700521]

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

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