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A237634 Number of (n+1)X(5+1) 0..2 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
4621, 4500, 2086, 2816, 4622, 5656, 7756, 11312, 17626, 22624, 30496, 45248, 70792, 90496, 121984, 180992, 283168, 361984, 487936, 723968, 1132672, 1447936, 1951744, 2895872, 4530688, 5791744, 7806976, 11583488, 18122752, 23166976, 31227904 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A237637

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-4) for n>13

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A189983 A295431 A338337 * A051649 A140175 A116226

Adjacent sequences:  A237631 A237632 A237633 * A237635 A237636 A237637

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 10 2014

STATUS

approved

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Last modified November 29 18:11 EST 2021. Contains 349416 sequences. (Running on oeis4.)