A236495 Number of (n+1)X(1+1) 0..3 arrays colored with the sum of the maximum and minimum values of each 2X2 subblock

256, 2228, 19856, 171436, 1503360, 13078180, 114229184, 995583500, 8688160944, 75762394644, 660932725968, 5764551429420, 50283755683392, 438589701233540, 3825664710332480, 33369191924137804, 291064911609837232

Offset

1,1

Comments

Column 1 of A236500

Links

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

Formula

Empirical: a(n) = 32*a(n-2) +208*a(n-3) +1222*a(n-4) +2448*a(n-5) +2716*a(n-6) +944*a(n-7) -681*a(n-8) -1944*a(n-9) -1248*a(n-10) -512*a(n-11) for n>12

Example

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

Crossrefs

Sequence in context: A207799 A207792 A236500 * A236118 A236113 A235521

Adjacent sequences: A236492 A236493 A236494 * A236496 A236497 A236498

Keyword

nonn

Author

R. H. Hardin, Jan 27 2014

Status

approved