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.

A207922 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically.

Table of values

n a(n)
1 42
2 1764
3 12994
4 101069
5 628945
6 4105063
7 28188778
8 187980955
9 1245595210
10 8342244698
11 55794408879
12 372138707621
13 2485175186365
14 16603501309984
15 110873077840653
16 740391497518318
17 4944900311857882
18 33024243581797845

List of values

[42, 1764, 12994, 101069, 628945, 4105063, 28188778, 187980955, 1245595210, 8342244698, 55794408879, 372138707621, 2485175186365, 16603501309984, 110873077840653, 740391497518318, 4944900311857882, 33024243581797845]

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

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