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A250377
Number of length 4+6 0..n arrays with every seven consecutive terms having the maximum of some three terms equal to the minimum of the remaining four terms
1
424, 16798, 202184, 1340867, 6202712, 22517208, 68640720, 183349893, 441598504, 978524338, 2024486872, 3954455687, 7355653592, 13117987436, 22552473504, 37543583241, 60742198824, 95806676806, 147700371688, 223054869835
OFFSET
1,1
COMMENTS
Row 4 of A250373
LINKS
FORMULA
Empirical: a(n) = (13/105)*n^9 + (156/35)*n^8 + 31*n^7 + (2561/30)*n^6 + (626/5)*n^5 + (3197/30)*n^4 + (653/14)*n^3 + (1534/105)*n^2 + (271/30)*n + 1
EXAMPLE
Some solutions for n=2
..2....0....1....1....1....0....0....2....0....2....2....2....1....2....2....2
..2....1....0....0....0....2....1....1....1....2....1....0....0....0....2....1
..1....1....1....0....1....1....1....2....1....1....2....2....0....1....2....1
..1....1....1....2....0....0....2....0....0....0....1....0....2....2....2....1
..2....1....2....1....1....0....2....1....0....0....1....0....0....1....2....1
..1....2....2....1....2....0....1....0....0....2....0....0....1....1....2....0
..0....1....1....1....2....0....0....1....0....1....0....2....0....2....1....2
..2....0....2....2....1....2....1....1....1....2....2....2....2....2....2....0
..2....0....0....1....0....2....2....1....2....2....1....0....0....0....2....1
..0....1....1....0....1....1....0....2....0....1....2....0....0....1....2....2
CROSSREFS
Sequence in context: A220541 A091292 A184766 * A250342 A232359 A294714
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 19 2014
STATUS
approved