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A254769
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Number of (n+2)X(2+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
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1
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2630, 11321, 55196, 250996, 1124228, 5140919, 23633202, 108849819, 502702408, 2323558628, 10742654676, 49672088300, 229690275939, 1062108485208, 4911279320298, 22710204623110, 105013833732614, 485591628870469
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OFFSET
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1,1
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COMMENTS
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Column 2 of A254775
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 6*a(n-1) -3*a(n-2) -6*a(n-3) -43*a(n-4) -77*a(n-5) +309*a(n-6) +116*a(n-7) +44*a(n-8) -130*a(n-9) -1557*a(n-10) -155*a(n-11) +535*a(n-12) +1646*a(n-13) +2223*a(n-14) -269*a(n-15) -483*a(n-16) -3009*a(n-17) +629*a(n-18) -994*a(n-19) -3413*a(n-20) +174*a(n-21) -3872*a(n-22) +6126*a(n-23) +7436*a(n-24) +4876*a(n-25) +5215*a(n-26) -11663*a(n-27) -4317*a(n-28) -6159*a(n-29) -7246*a(n-30) +12175*a(n-31) -2813*a(n-32) +8505*a(n-33) +4164*a(n-34) -4343*a(n-35) +1956*a(n-36) -15945*a(n-37) +4437*a(n-38) -5638*a(n-39) +10900*a(n-40) +13881*a(n-41) -5488*a(n-42) +6329*a(n-43) -18530*a(n-44) -1325*a(n-45) -475*a(n-46) -1024*a(n-47) +10773*a(n-48) -3387*a(n-49) +2336*a(n-50) -1038*a(n-51) -2044*a(n-52) +944*a(n-53) -672*a(n-54) +384*a(n-55) for n>65
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EXAMPLE
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Some solutions for n=3
..0..1..1..1....1..1..0..0....0..0..1..1....1..1..1..0....1..0..0..1
..1..0..0..1....0..0..0..0....1..0..1..0....0..1..1..0....0..1..0..0
..0..0..1..0....1..0..0..1....0..1..1..1....0..1..1..1....0..1..1..1
..0..1..1..0....0..1..1..1....0..1..1..1....1..1..1..1....1..1..1..0
..0..1..0..1....0..1..1..0....1..1..1..1....1..1..1..0....1..0..1..0
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CROSSREFS
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Sequence in context: A190936 A020439 A254776 * A254722 A236502 A212605
Adjacent sequences: A254766 A254767 A254768 * A254770 A254771 A254772
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Feb 07 2015
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STATUS
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approved
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