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A237229 Number of (n+1)X(3+1) 0..2 arrays with the maximum plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
928, 3284, 12014, 29456, 97862, 269844, 926086, 2450048, 8256930, 22301740, 75579798, 202641416, 684983946, 1842571444, 6234175914, 16748300216, 56643845034, 152257571812, 515024932506, 1384075694696, 4681456782942 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A237234

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-2) +42*a(n-4) -21*a(n-6) -207*a(n-8) for n>13

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A257485 A255106 A253039 * A219526 A249535 A340957

Adjacent sequences:  A237226 A237227 A237228 * A237230 A237231 A237232

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 05 2014

STATUS

approved

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Last modified January 19 22:12 EST 2022. Contains 350466 sequences. (Running on oeis4.)