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A265623 Number of 5Xn 0..5*n-1 arrays with upper left zero and lower right 5*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two. 0
125, 86800, 147336019, 283374980138, 1819521260530360, 272537666067980991, 2836220162505763363250, 2343924370920894151804111, 23094563458334697286346784805 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A265619.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=2

..0..4....0..8....0..1....0..4....0..1....0..1....0..1....0..4....0..2....0..2

..7..8....3..2....3..4....2..1....6..2....7..8....6..8....0..1....8..4....4..2

..9..5....8..4....8..4....5..6....0..2....7..3....8..7....7..8....5..6....6..8

..7..8....8..0....5..4....8..6....5..4....7..9....8..4....5..3....5..3....8..4

..8..9....7..9....1..9....7..9....1..9....5..9....5..9....7..9....1..9....8..9

CROSSREFS

Cf. A265619.

Sequence in context: A222277 A013783 A030697 * A050640 A161354 A318258

Adjacent sequences:  A265620 A265621 A265622 * A265624 A265625 A265626

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 10 2015

STATUS

approved

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Last modified October 18 06:50 EDT 2021. Contains 348066 sequences. (Running on oeis4.)