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A236712 Number of (n+1)X(1+1) 0..2 arrays colored with the maximum plus the lower median of every 2X2 subblock 1
81, 398, 1940, 9608, 47952, 237952, 1181504, 5866176, 29136768, 144679680, 718521728, 3568103296, 17719157632, 87992364672, 436975643520, 2170012116096, 10776237000576, 53514684402816, 265754308813696, 1319733513668736 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A236719

LINKS

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

FORMULA

Empirical: a(n) = 30*a(n-3) +269*a(n-4) +514*a(n-5) +1680*a(n-6) +2568*a(n-7) -364*a(n-8) +264*a(n-9) -19856*a(n-10) -31072*a(n-11) -40512*a(n-12) -74112*a(n-13) -34048*a(n-14) -33280*a(n-15) -20480*a(n-16)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A236618 A236611 A236719 * A206542 A206535 A017498

Adjacent sequences:  A236709 A236710 A236711 * A236713 A236714 A236715

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 30 2014

STATUS

approved

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Last modified June 17 17:12 EDT 2019. Contains 324196 sequences. (Running on oeis4.)