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A180771 T(n,k) = half the number of n X k binary arrays with each element equal to at least one neighbor. 11
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 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

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

CROSSREFS

Sequence in context: A316176 A317458 A301615 * A300546 A300973 A300930

Adjacent sequences:  A180768 A180769 A180770 * A180772 A180773 A180774

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Sep 20 2010

STATUS

approved

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Last modified October 20 02:21 EDT 2021. Contains 348099 sequences. (Running on oeis4.)