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 A254262 Number of (3+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
 12616, 59531, 268900, 1420232, 7815717, 43088793, 240716320, 1346708544, 7559651334, 42449504452, 238658639992, 1342042143877, 7550426286493, 42481932027323, 239056968325836, 1345288929918460, 7570964561656366 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 3 of A254260 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 10*a(n-1) -17*a(n-2) -84*a(n-3) +260*a(n-4) -164*a(n-5) -564*a(n-6) +2856*a(n-7) +11170*a(n-8) -41228*a(n-9) -72878*a(n-10) +251424*a(n-11) -198452*a(n-12) -328104*a(n-13) +2628780*a(n-14) +4648696*a(n-15) -20786505*a(n-16) -29452526*a(n-17) +74588439*a(n-18) +73057204*a(n-19) -41058408*a(n-20) -209594372*a(n-21) -74206736*a(n-22) +213851488*a(n-23) -212060864*a(n-24) +1110211136*a(n-25) -353377472*a(n-26) -1735241984*a(n-27) +1881662208*a(n-28) -2041185792*a(n-29) +721603584*a(n-30) +3116957696*a(n-31) -3646394368*a(n-32) +2008072192*a(n-33) -474447872*a(n-34) -2278555648*a(n-35) +2827354112*a(n-36) -1106116608*a(n-37) +103284736*a(n-38) +605028352*a(n-39) -788529152*a(n-40) +268435456*a(n-41) for n>47 EXAMPLE Some solutions for n=2 ..1..1..0..0....1..1..1..0....0..1..0..1....0..1..1..0....1..1..1..0 ..1..0..1..1....1..1..1..1....1..1..1..0....0..1..1..0....0..0..1..1 ..1..0..1..1....0..1..1..0....1..0..0..1....0..0..0..0....0..1..0..1 ..0..0..0..1....0..1..1..0....0..1..1..0....0..1..1..0....0..0..0..1 ..1..1..0..1....0..1..0..0....0..0..1..0....1..1..1..1....1..1..1..0 CROSSREFS Sequence in context: A187136 A185841 A219332 * A254255 A254301 A237388 Adjacent sequences: A254259 A254260 A254261 * A254263 A254264 A254265 KEYWORD nonn AUTHOR R. H. Hardin, Jan 27 2015 STATUS approved

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Last modified May 29 04:26 EDT 2024. Contains 372921 sequences. (Running on oeis4.)