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A212478 Number of 0..3 arrays of length 2*n+6 with sum no more than 3*n in any length 2n subsequence (=50% duty cycle) 1
5864, 172980, 3708268, 70600212, 1246724695, 21292987433, 357117150362, 5923063781205, 97514964737576, 1597131825489558, 26058934302628094, 423954039651724411, 6881835973423757103, 111509561797692820078 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A212471

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A272324 A104927 A183843 * A333232 A053340 A291597

Adjacent sequences:  A212475 A212476 A212477 * A212479 A212480 A212481

KEYWORD

nonn

AUTHOR

R. H. Hardin May 17 2012

STATUS

approved

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Last modified October 27 04:59 EDT 2021. Contains 348271 sequences. (Running on oeis4.)