A250380 Number of length 7+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

1996, 215345, 4766064, 49559017, 328905292, 1616234585, 6398378176, 21513933681, 63654214444, 169907055073, 416662805744, 951728421657, 2046486565228, 4177475716681, 8149944767744, 15279848491873, 27655502386188

Offset

1,1

Comments

Row 7 of A250373

Links

R. H. Hardin, Table of n, a(n) for n = 1..84

Formula

Empirical: a(n) = (194/1155)*n^11 + (4043/630)*n^10 + 60*n^9 + (467/2)*n^8 + 491*n^7 + (18913/30)*n^6 + (47464/105)*n^5 + (4811/126)*n^4 - (569/5)*n^3 + (1327/15)*n^2 + (17918/165)*n + 1

Example

Some solutions for n=1
..1....1....0....1....1....0....0....0....1....0....0....1....0....0....1....0
..1....1....0....1....1....1....0....0....1....1....1....1....0....0....1....0
..1....0....1....1....0....0....0....1....1....1....1....0....0....0....1....0
..1....1....0....1....1....0....0....0....0....0....0....0....1....0....0....1
..1....0....0....1....1....0....0....0....1....0....1....0....1....0....1....0
..1....0....1....1....1....1....0....0....1....0....1....0....0....1....1....0
..0....0....0....1....1....1....0....1....0....1....1....1....0....1....1....1
..0....1....0....1....1....0....0....0....1....0....1....0....0....0....0....0
..1....0....0....0....0....0....0....1....1....1....1....0....0....0....1....1
..1....1....1....0....1....0....0....0....1....0....1....1....0....0....1....0
..1....0....0....1....0....0....0....0....1....0....0....1....0....1....1....1
..1....0....0....1....1....1....0....0....1....1....1....0....1....0....0....0
..1....0....1....1....1....0....1....1....0....0....1....0....1....0....1....0

Crossrefs

Sequence in context: A223366 A034588 A233935 * A079012 A063472 A063054

Adjacent sequences: A250377 A250378 A250379 * A250381 A250382 A250383

Keyword

nonn

Author

R. H. Hardin, Nov 19 2014

Status

approved