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A265636 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, diagonal and antidiagonal neighbors by a power of two. 1
1, 0, 64, 559, 10444, 154825, 2325672, 32134921, 1147830996, 27155305770, 705652093502, 13954523202055, 385113044700852, 8391065973567203, 193546379545559324, 4212282964238008204, 146184585283154036226 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 2 of A265635.

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

CROSSREFS

Cf. A265635.

Sequence in context: A200841 A247929 A070054 * A209787 A247841 A209780

Adjacent sequences:  A265633 A265634 A265635 * A265637 A265638 A265639

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 11 2015

STATUS

approved

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Last modified June 24 21:50 EDT 2021. Contains 345433 sequences. (Running on oeis4.)