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.

A221665 Sum of neighbor maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 nX4 array.

Table of values

n a(n)
1 16
2 256
3 3772
4 63200
5 1048576
6 16777216
7 268281856
8 4294967296
9 68702508544
10 1099511627776
11 17592133540864
12 281474976710656
13 4503599627370496

List of values

[16, 256, 3772, 63200, 1048576, 16777216, 268281856, 4294967296, 68702508544, 1099511627776, 17592133540864, 281474976710656, 4503599627370496]

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

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