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A205241 Number of (n+1)X4 0..2 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in each of its horizontal and vertical neighbors 1
2990, 36478, 515162, 7051340, 97718448, 1334713506, 18384097800, 251875514320, 3461757498588, 47498508227712, 652418339064389, 8955881958241476, 122986967957641438, 1688504461834087204, 23185409190832766293 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A205246

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A108926 A159731 A221725 * A317398 A253962 A253955

Adjacent sequences:  A205238 A205239 A205240 * A205242 A205243 A205244

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 24 2012

STATUS

approved

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Last modified July 24 11:17 EDT 2021. Contains 346273 sequences. (Running on oeis4.)