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A222269 Number of nX1 0..3 arrays with exactly floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order 5
1, 0, 0, 3, 4, 8, 10, 55, 72, 294, 378, 1883, 2440, 11920, 15408, 78255, 101330, 517050, 669658, 3451712, 4473984, 23156964, 30030364, 156076271, 202510224, 1055435486, 1370043450, 7157673375, 9295027344, 48656943008, 63208940422, 331450961443 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
Column 1 of A222275
LINKS
EXAMPLE
All solutions for n=4
..0....0....0
..1....0....0
..1....0....1
..1....1....1
CROSSREFS
Sequence in context: A098764 A105407 A222395 * A310011 A047458 A004014
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 14 2013
STATUS
approved

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Last modified February 29 03:50 EST 2024. Contains 370401 sequences. (Running on oeis4.)