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.

A014235 Number of n X n matrices with entries 0 and 1 and no 2 X 2 submatrix of form [ 1 1; 1 0 ].

Table of values

n a(n)
0 1
1 2
2 12
3 128
4 2100
5 48032
6 1444212
7 54763088
8 2540607060
9 140893490432
10 9170099291892
11 690117597121328
12 59318536757456340
13 5763381455631211232
14 627402010180980401652
15 75942075645205885599248
16 10153054354133705795859540
17 1490544499134409408040599232

List of values

[1, 2, 12, 128, 2100, 48032, 1444212, 54763088, 2540607060, 140893490432, 9170099291892, 690117597121328, 59318536757456340, 5763381455631211232, 627402010180980401652, 75942075645205885599248, 10153054354133705795859540, 1490544499134409408040599232]

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

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