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A254769
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
1
2630, 11321, 55196, 250996, 1124228, 5140919, 23633202, 108849819, 502702408, 2323558628, 10742654676, 49672088300, 229690275939, 1062108485208, 4911279320298, 22710204623110, 105013833732614, 485591628870469
OFFSET
1,1
COMMENTS
Column 2 of A254775
LINKS
FORMULA
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
EXAMPLE
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
CROSSREFS
Sequence in context: A190936 A020439 A254776 * A254722 A236502 A212605
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 07 2015
STATUS
approved