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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
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
Sequence in context: A236153 A023351 A258534 * A254919 A109031 A137817
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 02 2015
STATUS
approved

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Last modified February 27 23:21 EST 2024. Contains 370379 sequences. (Running on oeis4.)