A235844 Number of (n+1)X(2+1) 0..3 arrays with the upper median unequal to the lower median in every 2X2 subblock

1584, 42080, 1133608, 30740652, 835207356, 22709045764, 617598961676, 16797812334528, 456890173049924, 12427268072102936, 338019044006491688, 9194058810113396648, 250076913816645728288, 6802052879255019191976

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