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.

A183816 1/81 the number of (n+1)X6 0..2 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.

Table of values

n a(n)
1 4096
2 1321860
3 414246824
4 131467169720
5 41531687999736
6 13143529051807800
7 4156740912572653752

List of values

[4096, 1321860, 414246824, 131467169720, 41531687999736, 13143529051807800, 4156740912572653752]

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

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