A235927 Number of (n+1) X (2+1) 0..3 arrays with the minimum plus the maximum unequal to the lower median plus the upper median in every 2 X 2 subblock.

1788, 51736, 1490648, 43061840, 1242490716, 35871300604, 1035323302960, 29885966087744, 862635390679796, 24900210870914920, 718738345158303008, 20746394342769170080, 598842214994663070416, 17285550535483405614604

Offset

1,1

Comments

Column 2 of A235932.

Links

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

Formula

Empirical: a(n) = 21*a(n-1) +444*a(n-2) -5573*a(n-3) -36510*a(n-4) +496805*a(n-5) -93227*a(n-6) -14098434*a(n-7) +55433514*a(n-8) -50052020*a(n-9) -120521304*a(n-10) +254545856*a(n-11) -50148800*a(n-12) -128903168*a(n-13) +19290112*a(n-14) +13308416*a(n-15) -415744*a(n-16) -258048*a(n-17).

Example

Some solutions for n=2
..0..2..3....1..1..3....2..1..1....2..3..3....1..0..0....0..2..2....3..0..0
..0..1..3....0..3..0....2..0..3....0..2..3....0..3..0....1..0..2....3..3..2
..1..3..0....1..3..3....3..0..2....3..2..2....3..3..3....3..0..0....2..3..3

Crossrefs

Cf. A235932.

Sequence in context: A202401 A237633 A244275 * A090232 A153837 A207555

Adjacent sequences: A235924 A235925 A235926 * A235928 A235929 A235930

Keyword

nonn

Author

R. H. Hardin, Jan 17 2014

Status

approved