A212239 - OEIS

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A212239

Number of 0..2 arrays of length 6+2*n with sum no more than 2*n in any length 2n subsequence (=50% duty cycle).

793, 11518, 131950, 1376128, 13468524, 128148456, 1200645159, 11143104246, 102770036310, 943639250739, 8636456931969, 78848824010001, 718489851092745, 6537040547889223, 59402114237433426, 539234176052230974

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Row 7 of A212232.

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

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

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

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

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

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

CROSSREFS

Cf. A212232.

Sequence in context: A037146 A045246 A095812 * A130555 A133537 A213471

Adjacent sequences: A212236 A212237 A212238 * A212240 A212241 A212242

KEYWORD

nonn

AUTHOR

R. H. Hardin May 06 2012

STATUS

approved