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

1,1

COMMENTS

Row 4 of A250373

LINKS

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

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

Adjacent sequences:  A250374 A250375 A250376 * A250378 A250379 A250380

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 19 2014

STATUS

approved

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Last modified May 10 02:36 EDT 2021. Contains 343747 sequences. (Running on oeis4.)