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A222900 Number of nX2 0..3 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
1, 4, 14, 75, 411, 2522, 15919, 103627, 683480, 4554799, 30542304, 205785953, 1391485044, 9436529666, 64150640719, 437015936703, 2982527052975, 20387828050502, 139566607631735, 956650211233825, 6564964362464004 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A222906

LINKS

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

EXAMPLE

Some solutions for n=3

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

..1..2....0..0....1..1....0..1....0..0....0..1....0..0....2..2....1..0....0..0

..2..2....0..0....1..1....0..0....0..0....1..1....1..2....2..2....0..0....1..0

CROSSREFS

Sequence in context: A088127 A242739 A007282 * A222485 A009347 A231510

Adjacent sequences:  A222897 A222898 A222899 * A222901 A222902 A222903

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 09 2013

STATUS

approved

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Last modified January 22 04:27 EST 2020. Contains 331133 sequences. (Running on oeis4.)