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A265173 Number of nX1 0..n*1-1 arrays with upper left zero and lower right n*1-1 and each element differing from its horizontal and vertical neighbors by a power of two. 6
1, 1, 1, 2, 16, 79, 456, 2194, 20801, 142675, 1104671, 7604426, 61694634, 451816635, 3436067731, 25239520503, 319613046628, 3036006671645, 30933754595164, 285945150234342, 3026592170353007, 28992125588332051, 285889488934911134 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Column 1 of A265178.

LINKS

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

EXAMPLE

All solutions for n=5

..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0

..1....4....2....2....1....2....1....4....2....2....2....4....4....1....2....2

..0....2....1....1....2....4....2....3....1....0....4....2....0....3....4....3

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

..4....4....4....4....4....4....4....4....4....4....4....4....4....4....4....4

CROSSREFS

Cf. A265178.

Sequence in context: A208835 A208683 A197992 * A264573 A225959 A336174

Adjacent sequences:  A265170 A265171 A265172 * A265174 A265175 A265176

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 03 2015

STATUS

approved

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Last modified May 17 23:07 EDT 2022. Contains 353779 sequences. (Running on oeis4.)