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A236447 Number of (n+1)X(3+1) 0..3 arrays colored with the difference of the maximum and minimum in each 2X2 subblock 1
17258, 280436, 4535608, 66621676, 1010208094, 15722137048, 247623908622, 3790739028840, 58545992300474, 905358628033160, 14130476092040594, 217449189657776236, 3373160484277287464, 52056868857459546556 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A236451

LINKS

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

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A043621 A293478 A076774 * A094413 A209967 A093790

Adjacent sequences:  A236444 A236445 A236446 * A236448 A236449 A236450

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 26 2014

STATUS

approved

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Last modified January 28 22:40 EST 2020. Contains 331328 sequences. (Running on oeis4.)