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A265620 Number of 2Xn 0..2*n-1 arrays with upper left zero and lower right 2*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two. 1
1, 0, 64, 908, 29296, 538517, 10912865, 202080075, 11808714880, 409351818615, 15022337089473, 422671294158187, 16797595808657585, 525856235658025845, 17318652008137477581, 541691832239493218144, 30028029442866868463331 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 2 of A265619.

LINKS

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

EXAMPLE

Some solutions for n=4

..0..1..3..5....0..2..6..2....0..4..3..1....0..1..5..1....0..4..5..4

..3..1..5..7....3..4..3..7....0..2..6..7....5..1..3..7....0..1..3..7

CROSSREFS

Cf. A265619.

Sequence in context: A306613 A185368 A027003 * A253133 A302321 A303015

Adjacent sequences:  A265617 A265618 A265619 * A265621 A265622 A265623

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 10 2015

STATUS

approved

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Last modified October 27 10:31 EDT 2021. Contains 348274 sequences. (Running on oeis4.)