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.

Previous Showing 11-11 of 11 results.

A275221 Number of n X n 0..2 arrays with no element equal to any value at offset (-2,-1), (-2,1) or (-1,0) and new values introduced in order 0..2.

Original entry on oeis.org

1, 6, 61, 1302, 64248, 6534900, 1368326231, 608741311725, 563051463762052
Offset: 1

Views

Author

R. H. Hardin, Jul 20 2016

Keywords

Comments

Diagonal of A275228.

Examples

			Some solutions for n=4
..0..1..2..1. .0..0..1..2. .0..1..0..2. .0..1..0..2. .0..1..0..2
..1..0..1..2. .2..1..2..1. .1..0..1..1. .1..0..2..0. .1..2..1..0
..0..1..0..1. .1..2..1..0. .2..1..0..2. .0..2..0..1. .2..1..0..1
..1..0..1..2. .2..0..2..1. .1..2..2..0. .2..0..1..0. .1..0..1..0

Crossrefs

Cf. A275228.
Previous Showing 11-11 of 11 results.

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

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