A254262 - OEIS

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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

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