A180771 T(n,k) = half the number of n X k binary arrays with each element equal to at least one neighbor.

0, 1, 1, 1, 3, 1, 2, 11, 11, 2, 3, 34, 63, 34, 3, 5, 111, 390, 390, 111, 5, 8, 361, 2385, 4475, 2385, 361, 8, 13, 1172, 14621, 52186, 52186, 14621, 1172, 13, 21, 3809, 89602, 606546, 1154119, 606546, 89602, 3809, 21, 34, 12377, 549125, 7053923, 25448809, 25448809

Offset: 1

Author

R. H. Hardin Sep 20 2010

Keywords

• nonn
• tabl

Comments

Table starts

..0.....1........1...........2.............3................5

..1.....3.......11..........34...........111..............361

..1....11.......63.........390..........2385............14621

..2....34......390........4475.........52186...........606546

..3...111.....2385.......52186.......1154119.........25448809

..5...361....14621......606546......25448809.......1064583557

..8..1172....89602.....7053923.....561487456......44560487654

.13..3809...549125....82032712...12387396391....1865051797753

.21.12377..3365327...953982820..273289411333...78060898850787

.34.40218.20624430.11094190209.6029284136868.3267207111743056

Links

• R. H. Hardin, Table of n, a(n) for n=1..264