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 A254840 Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally and vertically 1
 8776, 37642, 131776, 340387, 638688, 1102937, 1795490, 2870508, 4430116, 6683904, 10055304, 15093286, 22291032, 32547096, 47859712, 70745132, 103395658, 150104280, 220329220, 325793112, 476694716, 693576838, 1021640120, 1516194028 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A254845 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 4*a(n-1) -5*a(n-2) +a(n-3) +11*a(n-4) -36*a(n-5) +40*a(n-6) -2*a(n-7) -42*a(n-8) +89*a(n-9) -70*a(n-10) -39*a(n-11) +62*a(n-12) -2*a(n-13) -80*a(n-14) +148*a(n-15) -13*a(n-16) -159*a(n-17) +155*a(n-18) -76*a(n-19) -57*a(n-20) +88*a(n-21) +40*a(n-22) -96*a(n-23) +56*a(n-24) +16*a(n-25) -80*a(n-26) +64*a(n-27) -16*a(n-28) for n>47 EXAMPLE Some solutions for n=3 ..0..0..0..1..1....1..1..0..1..1....1..1..0..1..0....0..1..0..0..0 ..0..1..1..0..0....1..1..0..0..0....0..1..1..1..0....1..1..1..1..1 ..1..1..0..0..1....0..0..0..0..0....0..0..1..0..0....0..1..1..0..0 ..0..0..0..0..0....0..0..0..0..0....1..0..0..0..1....1..0..0..0..0 ..1..1..1..1..0....0..0..0..0..0....1..1..0..0..1....1..0..0..1..1 CROSSREFS Sequence in context: A237484 A255758 A255751 * A156083 A249956 A031791 Adjacent sequences: A254837 A254838 A254839 * A254841 A254842 A254843 KEYWORD nonn AUTHOR R. H. Hardin, Feb 08 2015 STATUS approved

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Last modified September 25 11:40 EDT 2023. Contains 365644 sequences. (Running on oeis4.)