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A212477 Number of 0..3 arrays of length 2*n+5 with sum no more than 3*n in any length 2n subsequence (=50% duty cycle) 1
2037, 53553, 1098260, 19960518, 344305566, 5795798788, 96239314549, 1584499716270, 25938577854660, 422900154613448, 6874291237701437, 111487268294929274, 1804868382278013414, 29177249831017201248 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A212471

LINKS

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

EXAMPLE

Some solutions for n=3

..2....0....2....0....2....0....0....2....2....2....2....0....0....0....2....0

..2....2....0....2....0....0....0....0....0....0....0....0....0....2....0....0

..0....0....0....2....0....2....0....0....0....2....0....0....2....2....0....2

..0....2....2....2....2....0....2....2....0....0....2....2....0....2....2....2

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A103126 A045869 A098808 * A020413 A031806 A186045

Adjacent sequences:  A212474 A212475 A212476 * A212478 A212479 A212480

KEYWORD

nonn

AUTHOR

R. H. Hardin May 17 2012

STATUS

approved

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Last modified August 20 16:20 EDT 2014. Contains 245799 sequences.