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A249975 Number of length n+1 0..2*1 arrays with the sum of the absolute values of adjacent differences equal to n*1 1
4, 10, 20, 64, 136, 466, 1012, 3580, 7864, 28340, 62696, 228700, 508400, 1870466, 4172660, 15449740, 34557400, 128583340, 288212440, 1076603824, 2417218544, 9058241620, 20366034760, 76521687304, 172247070064, 648634854904 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A249982
LINKS
EXAMPLE
Some solutions for n=6
..1....0....1....0....0....0....1....2....0....1....0....0....2....0....0....0
..2....1....2....0....2....2....1....1....0....2....2....1....0....1....1....0
..0....2....1....1....1....1....0....2....1....0....1....2....2....0....1....0
..1....1....1....0....0....2....2....2....0....0....2....2....1....1....0....2
..0....2....0....1....1....1....0....0....2....1....2....1....1....0....2....1
..1....1....2....2....1....0....0....0....0....2....0....0....0....1....2....0
..1....0....1....0....2....0....1....2....0....1....0....2....0....2....0....2
CROSSREFS
Sequence in context: A015220 A047199 A038065 * A306158 A339784 A277970
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 10 2014
STATUS
approved

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Last modified July 25 03:25 EDT 2024. Contains 374586 sequences. (Running on oeis4.)