A238050 Number of (n+1)X(2+1) 0..3 arrays with the maximum plus the minimum minus the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

1760, 20732, 249664, 3029204, 36751872, 446229436, 5413951288, 65636758792, 796414874192, 9671088645980, 117339031195880, 1422572305954956, 17261016589311336, 209605459590414108, 2543137127074039224

Offset

1,1

Comments

Column 2 of A238054

Links

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

Formula

Empirical: a(n) = 21904*a(n-4) -5020646*a(n-8) +499932588*a(n-12) -25264518617*a(n-16) +465397769602*a(n-20) -8930151275492*a(n-24) -30272393514402*a(n-28) -940962161512745*a(n-32) -9250969739341106*a(n-36) +3202689128170244*a(n-40) +45277613917985096*a(n-44) -41338678777674816*a(n-48) +4676290285004864*a(n-52) -425308924384640*a(n-56) +154898627924480*a(n-60) for n>64

Example

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

Crossrefs

Sequence in context: A031802 A020419 A141287 * A213804 A252309 A141039

Adjacent sequences: A238047 A238048 A238049 * A238051 A238052 A238053

Keyword

nonn

Author

R. H. Hardin, Feb 17 2014

Status

approved