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A210008 Number of (n+1)X5 0..2 arrays containing all values 0..2 with every 2X2 subblock having two or three distinct values, and new values 0..2 introduced in row major order 1
8217, 1808865, 385841179, 82060746485, 17447565687601, 3709556186877991, 788692753629890373, 167684774000295868135, 35651630563687273774303, 7579929460620522393582529, 1611576517115404819603119985 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A210012

LINKS

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

FORMULA

Empirical: a(n) = 218*a(n-1) -672*a(n-2) -102513*a(n-3) +336965*a(n-4) +9441327*a(n-5) -64650448*a(n-6) +29276745*a(n-7) +733248704*a(n-8) -1733314135*a(n-9) -814273096*a(n-10) +6961302814*a(n-11) -7307156292*a(n-12) -92994368*a(n-13) +3740262880*a(n-14) -1180127616*a(n-15) -466935296*a(n-16) +173254656*a(n-17) +18587648*a(n-18) -5406720*a(n-19)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A045060 A168471 A031844 * A168632 A230043 A045056

Adjacent sequences:  A210005 A210006 A210007 * A210009 A210010 A210011

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 16 2012

STATUS

approved

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Last modified December 8 12:55 EST 2016. Contains 278945 sequences.