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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
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
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.)