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A249227
Number of length n+5 0..2 arrays with no six consecutive terms having two times the sum of any two elements equal to the sum of the remaining four
1
486, 972, 1944, 3888, 7776, 15552, 31104, 62208, 124416, 248832, 497664, 995328, 1990656, 3981312, 7962624, 15925248, 31850496, 63700992, 127401984, 254803968, 509607936, 1019215872, 2038431744, 4076863488, 8153726976, 16307453952
OFFSET
1,1
COMMENTS
Column 2 of A249233
LINKS
FORMULA
Empirical: a(n) = 2*a(n-1)
EXAMPLE
Some solutions for n=9
..1....0....0....1....1....1....0....1....1....0....1....0....1....0....1....0
..1....2....2....1....0....1....1....0....1....1....1....2....2....1....0....1
..0....2....1....2....0....0....2....0....1....1....1....0....2....1....1....2
..2....2....0....1....0....2....1....1....2....1....0....1....1....1....2....0
..0....0....0....1....0....2....2....1....2....1....1....1....1....0....2....1
..1....2....2....1....0....2....2....2....1....0....1....0....1....2....1....1
..0....0....0....1....2....1....0....1....1....0....1....0....0....2....1....0
..2....2....1....2....2....1....0....2....0....1....1....0....0....2....1....1
..2....2....2....1....0....2....2....1....2....2....0....0....2....0....0....1
..0....2....2....2....0....0....2....0....2....1....1....0....1....1....2....0
..0....2....1....0....1....1....1....1....2....0....1....1....0....1....2....2
..1....0....1....1....0....0....0....0....1....1....1....1....1....2....2....0
..0....2....0....1....1....0....2....0....0....2....1....0....1....2....1....0
..1....2....1....2....2....1....0....0....1....2....1....0....0....2....0....1
CROSSREFS
Sequence in context: A097767 A031520 A235525 * A130181 A158325 A187860
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 23 2014
STATUS
approved