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.

A207841 Number of nX4 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically.

Table of values

n a(n)
1 10
2 100
3 180
4 780
5 2816
6 9672
7 35952
8 130152
9 462660
10 1691356
11 6097536
12 21894544
13 79589224
14 286756120
15 1033424532
16 3745763500
17 13500573120
18 48729856032
19 176324800080
20 635878928776
21 2296600176396
22 8301910089028
23 29954416843008

List of values

[10, 100, 180, 780, 2816, 9672, 35952, 130152, 462660, 1691356, 6097536, 21894544, 79589224, 286756120, 1033424532, 3745763500, 13500573120, 48729856032, 176324800080, 635878928776, 2296600176396, 8301910089028, 29954416843008]

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

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