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A237932 Number of (n+1)X(2+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
1718, 19694, 228866, 2744048, 32465580, 383375880, 4542257982, 54067139244, 641031056118, 7590349989188, 90016555755486, 1069015366100190, 12678249163053274, 150277119869692568, 1782427688138307804 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237936

LINKS

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

EXAMPLE

Some solutions for n=2

..3..1..0....1..0..0....3..2..1....1..3..0....1..1..2....3..3..3....1..3..2

..1..0..2....0..1..0....0..0..0....0..1..2....1..0..3....2..0..3....3..2..3

..2..0..2....1..1..0....1..3..2....2..3..3....0..2..0....2..3..2....3..0..2

CROSSREFS

Sequence in context: A068303 A212929 A252610 * A276458 A252857 A234906

Adjacent sequences: A237929 A237930 A237931 * A237933 A237934 A237935

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 16 2014

STATUS

approved

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Last modified February 3 05:52 EST 2023. Contains 360024 sequences. (Running on oeis4.)