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A212474 Number of 0..3 arrays of length 2*n+2 with sum no more than 3*n in any length 2n subsequence (=50% duty cycle) 1
85, 1597, 27024, 445780, 7274268, 118029501, 1908601444, 30794657082, 496095308012, 7983014938756, 128351434757356, 2062286003105664, 33118464621596452, 531627920798750598, 8530886270887938488 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A212471

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A166917 A206377 A008360 * A020310 A163692 A221339

Adjacent sequences:  A212471 A212472 A212473 * A212475 A212476 A212477

KEYWORD

nonn

AUTHOR

R. H. Hardin May 17 2012

STATUS

approved

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Last modified June 25 17:47 EDT 2019. Contains 324353 sequences. (Running on oeis4.)