A250343 Number of length 7+5 0..n arrays with every six consecutive terms having the maximum of some three terms equal to the minimum of the remaining three terms

648, 46941, 682576, 5156313, 26422104, 104374957, 341862816, 971811153, 2472291496, 5751557757, 12430964976, 25260273961, 48707132280, 89770507149, 159076528960, 272324585505, 452161586376, 730573094557, 1151891497872

Offset

1,1

Comments

Row 7 of A250336

Links

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

Formula

Empirical: a(n) = (202/105)*n^9 + (249/10)*n^8 + (217/2)*n^7 + 224*n^6 + 267*n^5 + (2031/10)*n^4 + (1301/42)*n^3 - 129*n^2 - (422/5)*n + 1

Example

Some solutions for n=2
..0....1....2....2....0....0....0....0....0....1....0....1....2....2....2....1
..0....1....2....1....2....1....2....1....0....0....0....2....0....1....2....0
..0....2....1....1....1....1....0....1....2....2....2....1....1....2....0....0
..0....1....0....0....1....0....1....1....1....0....1....2....2....0....1....0
..1....1....0....2....2....1....0....0....2....1....1....0....2....1....0....0
..2....2....1....0....1....1....0....2....1....1....2....0....2....1....1....1
..0....0....1....2....1....2....0....0....1....2....1....1....2....2....1....0
..0....0....1....1....1....2....0....1....1....1....1....1....2....1....1....0
..0....1....2....1....1....0....0....1....0....1....1....1....1....0....2....0
..0....1....1....1....1....1....1....2....1....2....1....2....2....1....0....2
..2....1....0....1....0....1....2....0....1....1....0....2....2....2....0....0
..2....1....1....2....2....1....0....2....1....0....2....1....1....0....2....1

Crossrefs

Sequence in context: A282334 A034619 A185270 * A035755 A107551 A202056

Adjacent sequences: A250340 A250341 A250342 * A250344 A250345 A250346

Keyword

nonn

Author

R. H. Hardin, Nov 19 2014

Status

approved