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A236037 Number of (n+1)X(1+1) 0..3 arrays colored with the difference of the upper median and the lower median in each 2X2 subblock 1
256, 2404, 22994, 218568, 2089160, 19942272, 190367530, 1816294128, 17335318922, 165440670368, 1578998735732, 15069102332776, 143817863303654, 1372548635240096, 13099384602990930, 125016639614921288 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A236041

LINKS

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

FORMULA

Empirical: a(n) = 28*a(n-2) +174*a(n-3) +2550*a(n-4) +8646*a(n-5) +41209*a(n-6) +132326*a(n-7) +160996*a(n-8) +471512*a(n-9) -257088*a(n-10) -2520320*a(n-11) -1767936*a(n-12) -8040704*a(n-13) -14097408*a(n-14) -5087232*a(n-15) -10715136*a(n-16) -11796480*a(n-17)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A236083 A016780 A236041 * A251120 A251114 A205181

Adjacent sequences:  A236034 A236035 A236036 * A236038 A236039 A236040

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2014

STATUS

approved

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Last modified December 5 04:10 EST 2021. Contains 349530 sequences. (Running on oeis4.)