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A222450 Number of nX2 0..1 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..1 order 1
0, 0, 2, 7, 10, 23, 64, 175, 400, 983, 2498, 6409, 15982, 40282, 102240, 260590, 662008, 1685764, 4301724, 10996863, 28122246, 71995471, 184507156, 473312401, 1215008846, 3121272497, 8023924572, 20640895689, 53127720534, 136821537884 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A222456

LINKS

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

EXAMPLE

All solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A191832 A066964 A066967 * A032007 A091295 A215407

Adjacent sequences:  A222447 A222448 A222449 * A222451 A222452 A222453

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 20 2013

STATUS

approved

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Last modified April 22 14:33 EDT 2019. Contains 322356 sequences. (Running on oeis4.)