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A235844 Number of (n+1)X(2+1) 0..3 arrays with the upper median unequal to the lower median in every 2X2 subblock 1
1584, 42080, 1133608, 30740652, 835207356, 22709045764, 617598961676, 16797812334528, 456890173049924, 12427268072102936, 338019044006491688, 9194058810113396648, 250076913816645728288, 6802052879255019191976 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A235849

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 43*a(n-1) -412*a(n-2) -1616*a(n-3) +33358*a(n-4) -51724*a(n-5) -518856*a(n-6) +1084075*a(n-7) +3131555*a(n-8) -5725376*a(n-9) -8197786*a(n-10) +8859758*a(n-11) +7608230*a(n-12) -2263560*a(n-13) -1233600*a(n-14) +36864*a(n-15)

EXAMPLE

Some solutions for n=2

..2..3..2....0..3..3....2..0..2....3..2..3....2..3..2....2..0..3....0..0..2

..1..1..0....0..1..1....1..2..0....2..3..1....1..3..1....3..1..3....2..2..1

..3..3..3....0..2..3....1..2..0....0..0..0....3..2..3....0..3..2....0..0..3

CROSSREFS

Sequence in context: A053170 A237916 A159211 * A277766 A224940 A224941

Adjacent sequences:  A235841 A235842 A235843 * A235845 A235846 A235847

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 16 2014

STATUS

approved

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Last modified May 16 17:10 EDT 2021. Contains 343949 sequences. (Running on oeis4.)