A237235 Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock equal

256, 1280, 6976, 40064, 234752, 1395200, 8344576, 50202624, 302927872, 1834229760, 11124686848, 67635806208, 411596816384, 2509448019968, 15307122147328, 93512310194176, 571374872559616, 3495701365391360

Offset

1,1

Comments

Column 1 of A237241

Links

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

Formula

Empirical: a(n) = 14*a(n-1) -784*a(n-3) +2736*a(n-4) +10208*a(n-5) -59776*a(n-6) -17408*a(n-7) +443392*a(n-8) -342016*a(n-9) -1089536*a(n-10) +1376256*a(n-11)

Example

Some solutions for n=4
..1..1....3..1....1..0....1..0....1..0....2..0....2..3....2..3....2..3....3..3
..1..0....2..1....0..0....1..1....3..2....3..1....3..2....2..1....3..1....0..0
..3..3....1..3....1..2....2..1....2..1....0..2....2..3....1..0....2..1....2..2
..2..3....2..3....3..1....2..2....2..3....3..1....2..3....1..2....1..3....1..1
..3..3....2..2....2..1....3..2....3..0....3..3....2..3....1..0....1..2....0..0

Crossrefs

Sequence in context: A237241 A120054 A237952 * A129539 A113877 A237398

Adjacent sequences: A237232 A237233 A237234 * A237236 A237237 A237238

Keyword

nonn

Author

R. H. Hardin, Feb 05 2014

Status

approved