A237236 Number of (n+1)X(2+1) 0..3 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock equal

1280, 10304, 91744, 853152, 8036672, 76825568, 738844928, 7176050400, 69914628864, 686426761312, 6746879296128, 66745483168480, 660133372477184, 6566736980062048, 65246176244780416, 651787243233111008

Offset

1,1

Comments

Column 2 of A237241

Links

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

Formula

Empirical: a(n) = 27*a(n-1) -91*a(n-2) -3569*a(n-3) +35156*a(n-4) +49666*a(n-5) -1874168*a(n-6) +4352300*a(n-7) +38774384*a(n-8) -177907576*a(n-9) -291750128*a(n-10) +2804232800*a(n-11) -1221147328*a(n-12) -21414085888*a(n-13) +34643343872*a(n-14) +71205959680*a(n-15) -216011419648*a(n-16) -11342790656*a(n-17) +524108857344*a(n-18) -420200841216*a(n-19) -327413137408*a(n-20) +579833167872*a(n-21) -214563815424*a(n-22)

Example

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

Crossrefs

Sequence in context: A251783 A224645 A237953 * A090006 A170784 A269826

Adjacent sequences: A237233 A237234 A237235 * A237237 A237238 A237239

Keyword

nonn

Author

R. H. Hardin, Feb 05 2014

Status

approved