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.

A207912 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 0 1 1 vertically.

Table of values

n a(n)
1 25
2 625
3 2625
4 11025
5 110775
6 1113025
7 6835345
8 41977441
9 336253621
10 2693506201
11 18577402747
12 128130350209
13 960194962333
14 7195597016521
15 51458156348129
16 367994740209721
17 2701833829557059
18 19836984730756561
19 143485534654475891

List of values

[25, 625, 2625, 11025, 110775, 1113025, 6835345, 41977441, 336253621, 2693506201, 18577402747, 128130350209, 960194962333, 7195597016521, 51458156348129, 367994740209721, 2701833829557059, 19836984730756561, 143485534654475891]

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

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