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A253363 Number of (n+2)X(4+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal maximum minus antidiagonal minimum unequal to its neighbors horizontally and vertically 1
976, 1536, 5280, 8904, 23936, 53128, 112864, 286888, 563680, 1423176, 2930016, 6871944, 15255904, 33827528, 78045536, 171672968, 393400928, 883617736, 1976015712, 4530604552, 9969715808, 23004361288, 50570530144, 116107771016 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A253367

LINKS

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

FORMULA

Empirical: a(n) = 9*a(n-2) -32*a(n-4) +60*a(n-6) +4*a(n-8) +16*a(n-10) -32*a(n-12) +16*a(n-14) for n>16

EXAMPLE

Some solutions for n=4

..0..1..0..0..0..0....0..1..0..1..0..0....1..0..1..0..1..0....0..1..1..1..1..1

..1..0..0..0..1..0....1..0..0..0..0..0....0..0..0..0..0..0....0..0..1..0..1..0

..0..1..0..1..0..0....0..1..0..1..0..1....1..0..1..0..1..0....1..1..1..1..0..1

..1..0..0..0..0..0....0..0..0..0..0..0....0..1..0..0..0..1....1..0..1..0..1..1

..0..0..0..1..0..1....1..1..0..1..0..1....0..0..1..0..1..0....1..1..1..1..0..1

..1..0..1..0..0..0....1..0..0..0..0..0....1..1..0..0..0..1....1..0..1..0..1..1

CROSSREFS

Sequence in context: A251838 A251845 A254072 * A253907 A233984 A205252

Adjacent sequences: A253360 A253361 A253362 * A253364 A253365 A253366

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 30 2014

STATUS

approved

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Last modified March 28 08:48 EDT 2023. Contains 361584 sequences. (Running on oeis4.)