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.

A207431 Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically.

Table of values

n a(n)
1 31
2 961
3 11067
4 127449
5 2048823
6 32936121
7 474552171
8 6837470721
9 102807481767
10 1545802349809
11 22864149458035
12 338186399124025
13 5035128104126565
14 74966098845588129
15 1113208750837622133
16 16530588386278151641

List of values

[31, 961, 11067, 127449, 2048823, 32936121, 474552171, 6837470721, 102807481767, 1545802349809, 22864149458035, 338186399124025, 5035128104126565, 74966098845588129, 1113208750837622133, 16530588386278151641]

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

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