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A253732 Number of (n+2)X(n+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal sum minus antidiagonal sum unequal to its neighbors horizontally and vertically 0
218, 1888, 7216, 54688, 400068, 3369876, 40265740, 774250356, 16204708792, 401697467244, 13688214787176, 637511964938288, 35097886281624988 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A253740
LINKS
EXAMPLE
Some solutions for n=4
..0..1..0..1..0..1....0..1..0..1..1..0....1..0..1..0..0..0....0..0..0..1..0..1
..1..0..1..0..1..0....0..0..1..0..1..0....1..1..0..1..0..0....0..0..1..0..1..1
..0..1..1..1..0..1....0..0..0..1..0..1....1..1..1..0..1..0....0..1..0..0..0..1
..1..0..1..1..1..0....1..0..0..0..1..0....0..1..1..1..0..1....1..0..0..0..1..0
..0..1..0..1..0..1....0..1..0..0..0..1....1..0..1..1..1..0....0..1..0..1..0..0
..1..1..1..1..1..1....1..0..1..0..0..0....1..1..0..1..0..1....0..0..1..0..1..1
CROSSREFS
Sequence in context: A241102 A292545 A321115 * A232513 A224741 A209824
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 11 2015
STATUS
approved

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Last modified May 22 06:48 EDT 2024. Contains 372743 sequences. (Running on oeis4.)