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

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

Offset

1,4

Comments

Column 1 of A222275

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

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

Adjacent sequences: A222266 A222267 A222268 * A222270 A222271 A222272

Keyword

nonn

Author

R. H. Hardin Feb 14 2013

Status

approved