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A236445 Number of (n+1)X(1+1) 0..3 arrays colored with the difference of the maximum and minimum in each 2X2 subblock 1
256, 2116, 17258, 136208, 1080984, 8564392, 67897642, 538065184, 4265291002, 33804568568, 267953875076, 2123741832432, 16833511636310, 133421518052528, 1057529601925106, 8382006062940352, 66437217185516568, 526585866692093976 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A236451

LINKS

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

FORMULA

Empirical: a(n) = 32*a(n-2) +90*a(n-3) +846*a(n-4) +2418*a(n-5) +3809*a(n-6) +5178*a(n-7) +3384*a(n-8) +3328*a(n-9) +1024*a(n-10) +512*a(n-11) for n>13

EXAMPLE

Some solutions for n=4

..2..0....2..0....1..3....0..3....0..0....2..3....1..2....2..3....1..0....2..0

..0..1....3..1....1..0....1..1....1..3....3..3....2..3....2..0....0..1....1..2

..1..0....3..2....2..2....0..0....2..3....1..2....0..0....1..2....2..0....1..1

..1..2....1..0....3..2....3..2....1..0....1..2....0..0....1..1....3..1....1..1

..1..1....2..0....0..1....1..1....0..0....0..0....2..3....0..2....1..2....3..3

CROSSREFS

Sequence in context: A221487 A014711 A236451 * A205954 A205466 A205459

Adjacent sequences: A236442 A236443 A236444 * A236446 A236447 A236448

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 26 2014

STATUS

approved

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Last modified December 3 13:34 EST 2022. Contains 358524 sequences. (Running on oeis4.)