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A213468
Number of 0..3 arrays of length 2*n+3 with sum less than 3*n in any length 2n subsequence (=less than 50% duty cycle)
1
70, 2735, 58898, 1091036, 19105020, 325333429, 5451265872, 90406374528, 1488870622780, 24396922947484, 398282413965566, 6483402596528564, 105301980143117156, 1707201970861977822, 27637076220888829232
OFFSET
1,1
COMMENTS
Row 4 of A213464
LINKS
EXAMPLE
Some solutions for n=3
..0....2....2....1....0....2....0....0....3....1....1....0....0....0....1....3
..2....3....2....0....0....0....2....2....1....2....3....0....2....2....3....1
..1....1....0....3....2....1....1....1....1....3....0....0....0....2....3....0
..0....2....0....0....0....2....2....2....0....0....1....2....0....0....0....0
..0....0....0....0....0....1....0....0....0....0....1....1....0....0....1....2
..2....0....3....3....0....0....0....2....3....1....2....0....3....2....0....0
..3....0....0....0....1....0....1....1....0....0....1....0....2....1....1....1
..1....3....0....1....2....2....3....2....3....0....0....1....0....3....0....0
..1....0....2....1....3....2....2....1....2....3....0....1....2....2....3....3
CROSSREFS
Sequence in context: A035730 A017733 A197192 * A004377 A069296 A349466
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 12 2012
STATUS
approved