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.

A208875 Number of 4Xn 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.

Table of values

n a(n)
1 15
2 1979
3 324682
4 52947540
5 8624977114
6 1404920207834
7 228847686794351
8 37277070892199501
9 6072074518379364073
10 989082262060956074133
11 161111942886719306980432
12 26243578660069203997974518

List of values

[15, 1979, 324682, 52947540, 8624977114, 1404920207834, 228847686794351, 37277070892199501, 6072074518379364073, 989082262060956074133, 161111942886719306980432, 26243578660069203997974518]

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

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