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.

A183518 Number of n X n 0..2 arrays with each element equal to either the sum mod 3 of its horizontal and vertical neighbors or the sum mod 3 of its diagonal and antidiagonal neighbors.

Table of values

n a(n)
1 1
2 9
3 101
4 3507
5 371691
6 89738569

List of values

[1, 9, 101, 3507, 371691, 89738569]

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

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