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.

A221288 Equals two maps: number of nX5 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 nX5 array.

Table of values

n a(n)
1 7
2 200
3 5912
4 172904
5 4983598
6 143511784
7 4129628435
8 118813480496
9 3418203388701
10 98338490101681
11 2829094038032543
12 81389941488977962
13 2341498869979723606
14 67362334665049967042
15 1937939871911867309221

List of values

[7, 200, 5912, 172904, 4983598, 143511784, 4129628435, 118813480496, 3418203388701, 98338490101681, 2829094038032543, 81389941488977962, 2341498869979723606, 67362334665049967042, 1937939871911867309221]

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

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