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A222452 Number of nX4 0..1 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..1 order 1
3, 7, 17, 101, 426, 1722, 8483, 46788, 246899, 1263032, 6568737, 34802586, 184657217, 976867173, 5178449568, 27557967928, 146974586179, 784645686795, 4194027064034, 22450449919571, 120330101083792, 645608703621958 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A222456

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..204

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A128343 A106877 A041949 * A218165 A102329 A327321

Adjacent sequences:  A222449 A222450 A222451 * A222453 A222454 A222455

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 20 2013

STATUS

approved

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Last modified January 25 01:43 EST 2020. Contains 331229 sequences. (Running on oeis4.)