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A254770 Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and the central column and the two medians of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
11677, 50173, 295516, 1901784, 11736086, 72739438, 462927268, 2925883667, 18462927533, 116757027289, 738370654171, 4667167731292, 29509145886141, 186576342001502, 1179604295993078, 7457967831756923, 47153169509714961 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A254775

LINKS

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

FORMULA

Empirical: a(n) = 7*a(n-1) +a(n-2) -36*a(n-3) +104*a(n-4) -577*a(n-5) +406*a(n-6) -2654*a(n-7) -1083*a(n-8) +54521*a(n-9) -21741*a(n-10) -154770*a(n-11) +38931*a(n-12) -13306*a(n-13) -72151*a(n-14) +367153*a(n-15) +1186616*a(n-16) +175841*a(n-17) -2541563*a(n-18) -2203312*a(n-19) -1102181*a(n-20) +5457515*a(n-21) +3952319*a(n-22) -2371833*a(n-23) +70124*a(n-24) -8362041*a(n-25) +760917*a(n-26) +7641448*a(n-27) -182502*a(n-28) -1743336*a(n-29) -1390764*a(n-30) -1542892*a(n-31) -296088*a(n-32) +4265808*a(n-33) -720384*a(n-34) -1733104*a(n-35) +286080*a(n-36) +165568*a(n-37) +32960*a(n-38) for n>51

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A223598 A223439 A223691 * A254777 A254723 A031631

Adjacent sequences:  A254767 A254768 A254769 * A254771 A254772 A254773

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 07 2015

STATUS

approved

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Last modified May 19 14:51 EDT 2022. Contains 353834 sequences. (Running on oeis4.)