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A253366 Number of (n+2)X(7+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal maximum minus antidiagonal minimum unequal to its neighbors horizontally and vertically 1
6544, 10496, 63496, 112864, 438504, 1255456, 3424264, 12086016, 30463848, 105411360, 297371496, 895963200, 2923064968, 7866453088, 27463800200, 72611337216, 246664512040, 686842721696, 2178075395368, 6439302714048 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A253367

LINKS

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

FORMULA

Empirical: a(n) = 21*a(n-2) -198*a(n-4) +1114*a(n-6) -3665*a(n-8) +12265*a(n-10) -37276*a(n-12) +60072*a(n-14) -35500*a(n-16) -80480*a(n-18) +44160*a(n-20) +26752*a(n-22) -18496*a(n-24) +12352*a(n-26) +960*a(n-28) -2048*a(n-30) for n>33

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A229391 A101704 A147872 * A251110 A248064 A236898

Adjacent sequences:  A253363 A253364 A253365 * A253367 A253368 A253369

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 30 2014

STATUS

approved

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Last modified August 25 21:00 EDT 2019. Contains 326324 sequences. (Running on oeis4.)