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.

A209645 Number of n X n 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 0 1 and 1 0 1 vertically.

Table of values

n a(n)
1 2
2 16
3 102
4 630
5 4690
6 34012
7 287140
8 2364992
9 22028490
10 200930125
11 2026692954
12 20118254688
13 217071252489
14 2316174126448
15 26506083938686
16 301219138880440
17 3632894429145798
18 43657425153387876
19 552138493209771090

List of values

[2, 16, 102, 630, 4690, 34012, 287140, 2364992, 22028490, 200930125, 2026692954, 20118254688, 217071252489, 2316174126448, 26506083938686, 301219138880440, 3632894429145798, 43657425153387876, 552138493209771090]

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

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