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.

A279981 Number of 5Xn 0..1 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Original entry on oeis.org

0, 108, 1650, 15511, 124030, 887491, 5870751, 37029063, 224989656, 1329149598, 7678897522, 43562801122, 243417797716, 1342868232191, 7327618165054, 39607933952548, 212329659406086, 1129989079237450, 5974847669219636
Offset: 1

Views

Author

R. H. Hardin, Dec 24 2016

Keywords

Comments

Row 5 of A279977.

Examples

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

Crossrefs

Cf. A279977.