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A222610 Number of nX2 0..3 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
1, 1, 3, 12, 40, 149, 615, 2659, 11641, 51672, 231598, 1044550, 4729221, 21473854, 97727797, 445587611, 2034814173, 9304775285, 42600153350, 195249156987, 895771869115, 4113392176083, 18904548916567, 86949854091897 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A222616

LINKS

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

EXAMPLE

All solutions for n=3

..0..0....0..1....0..0

..0..0....1..1....0..0

..0..0....1..1....0..1

CROSSREFS

Sequence in context: A026071 A102839 A050182 * A162970 A126725 A053043

Adjacent sequences:  A222607 A222608 A222609 * A222611 A222612 A222613

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 26 2013

STATUS

approved

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Last modified October 23 03:42 EDT 2021. Contains 348211 sequences. (Running on oeis4.)