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.

A207595 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.

Table of values

n a(n)
1 2
2 16
3 90
4 441
5 3915
6 42025
7 292600
8 1982464
9 21925800
10 268730449
11 2281109103
12 19215781641
13 242188032450
14 3266593546384
15 32361595709850
16 320442399819025
17 4434278073813775
18 64468102969055809
19 723471023371037040

List of values

[2, 16, 90, 441, 3915, 42025, 292600, 1982464, 21925800, 268730449, 2281109103, 19215781641, 242188032450, 3266593546384, 32361595709850, 320442399819025, 4434278073813775, 64468102969055809, 723471023371037040]

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

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