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A265631 Number of nX2 0..n*2-1 arrays with upper left zero and lower right n*2-1 and each element differing from its horizontal, diagonal and antidiagonal neighbors by a power of two. 1
1, 0, 21, 585, 8463, 294394, 6639203, 120126908, 6260685646, 196840463674, 6508183174645, 197814464077227, 7365189521794194, 230043726410889775, 7646516518149412694, 244311983316534271813, 12925753804930923765113 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A265635.

LINKS

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

EXAMPLE

Some solutions for n=4

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

..3..1....3..1....6..2....2..4....6..2....3..4....3..2....6..4....3..4....6..4

..5..7....3..5....3..7....6..4....3..4....6..4....3..4....5..4....5..7....6..4

..6..7....6..7....6..7....3..7....6..7....5..7....3..7....6..7....6..7....3..7

CROSSREFS

Cf. A265635.

Sequence in context: A199254 A199199 A089457 * A009091 A231639 A159278

Adjacent sequences:  A265628 A265629 A265630 * A265632 A265633 A265634

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 11 2015

STATUS

approved

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Last modified December 8 17:01 EST 2021. Contains 349596 sequences. (Running on oeis4.)