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A297304 Number of 7Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 2 neighboring 1s. 1
1, 1, 21, 69, 266, 1574, 13504, 93906, 551477, 3159693, 18792129, 113862870, 692747205, 4226551294, 25828653795, 157805371000, 963306137176, 5876339680839, 35834865220658, 218515617055715, 1332575380148292 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Row 7 of A297299.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..0..0. .0..0..1..1..0. .0..0..0..1..1. .0..0..0..0..0
..1..1..0..0..0. .0..1..1..0..0. .0..0..1..1..0. .0..1..1..0..0
..0..0..0..0..0. .0..0..1..1..1. .0..0..0..0..0. .1..1..0..0..0
..0..0..0..0..0. .0..1..0..1..1. .0..1..1..0..0. .0..1..1..0..0
..0..0..0..0..0. .1..1..0..1..0. .1..1..0..1..1. .1..1..0..0..0
..0..0..0..1..1. .1..1..1..0..0. .0..0..1..1..0. .0..1..1..0..0
..0..0..1..1..0. .0..0..0..0..0. .0..0..0..0..0. .1..1..0..0..0
CROSSREFS
Cf. A297299.
Sequence in context: A224072 A020150 A178389 * A155492 A201066 A200931
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 27 2017
STATUS
approved

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Last modified June 12 16:34 EDT 2024. Contains 373334 sequences. (Running on oeis4.)