A253364 - OEIS

A253364

Number of (n+2)X(5+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal maximum minus antidiagonal minimum unequal to its neighbors horizontally and vertically

1904, 3136, 13800, 23936, 76840, 175328, 438504, 1151296, 2656232, 7032608, 17090280, 42368896, 111988680, 261552224, 723071304, 1661410368, 4573702312, 10671650720, 28629961640, 68211963648, 179436757256, 431899660512

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 5 of A253367

LINKS

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

FORMULA

Empirical: a(n) = 12*a(n-2) -58*a(n-4) +152*a(n-6) -105*a(n-8) +248*a(n-10) -500*a(n-12) +236*a(n-14) -128*a(n-16) for n>19

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A237787 A190653 A124628 * A112947 A367229 A355891

Adjacent sequences: A253361 A253362 A253363 * A253365 A253366 A253367

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 30 2014

STATUS

approved