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.

A186557 Number of (n+1)X5 0..3 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors.

Table of values

n a(n)
1 927477
2 783375343
3 663296784123
4 561714653720250
5 475681559860717916
6 402827283017904807331
7 341131017852900112413067
8 288884064380556803805427879
9 244639147969972250796140260427

List of values

[927477, 783375343, 663296784123, 561714653720250, 475681559860717916, 402827283017904807331, 341131017852900112413067, 288884064380556803805427879, 244639147969972250796140260427]

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

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