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.

A208554 Number of nX7 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 0 1 1 vertically.

Table of values

n a(n)
1 42
2 1764
3 10710
4 65025
5 221340
6 753424
7 1913940
8 4862025
9 10332630
10 21958596
11 41363322
12 77915929
13 134523480
14 232257600
15 375406920
16 606784689
17 931373730
18 1429596100
19 2104920510
20 3099260241
21 4409811252
22 6274540944
23 8675694300

List of values

[42, 1764, 10710, 65025, 221340, 753424, 1913940, 4862025, 10332630, 21958596, 41363322, 77915929, 134523480, 232257600, 375406920, 606784689, 931373730, 1429596100, 2104920510, 3099260241, 4409811252, 6274540944, 8675694300]

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

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