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A258527 Number of (n+2)X(5+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and central column plus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
294960, 2927601, 18460629, 27337100, 65947572, 159909048, 376000912, 1197367724, 3293371180, 8405740372, 25638745828, 73266758932, 207386130564, 602882751988, 1758606399332, 4902574429396, 14705322089028, 43968973836212 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A258530

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +7*a(n-2) +8*a(n-3) -24*a(n-4) -72*a(n-5) +144*a(n-6) -1472*a(n-7) -1280*a(n-8) +3712*a(n-9) +28672*a(n-10) +9216*a(n-11) -88064*a(n-12) -98304*a(n-13) +16384*a(n-14) +393216*a(n-15) -262144*a(n-16) for n>25

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Cf. A258530

Sequence in context: A236153 A023351 A258534 * A254919 A109031 A137817

Adjacent sequences:  A258524 A258525 A258526 * A258528 A258529 A258530

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 02 2015

STATUS

approved

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Last modified September 25 04:20 EDT 2021. Contains 347652 sequences. (Running on oeis4.)