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A253484 Number of (3+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically 1
3888, 85280, 1962374, 44878810, 1028601406, 23553719782, 539599344188, 12359428902608, 283115374994698, 6485039906571714, 148548569346340394, 3402684107566122626, 77942770831566300150, 1785375804378076728772 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A253482

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A246735 A283026 A014891 * A253479 A186135 A223597

Adjacent sequences:  A253481 A253482 A253483 * A253485 A253486 A253487

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 02 2015

STATUS

approved

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Last modified July 22 15:00 EDT 2019. Contains 325224 sequences. (Running on oeis4.)