A250379 Number of length 6+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

1198, 92497, 1680652, 15139945, 89632970, 400455241, 1460936344, 4572816753, 12694412710, 31993255009, 74462887204, 162125953561, 333521588674, 653388603545, 1226711384368, 2218597290337, 3881807338398, 6594170951665

Offset

1,1

Comments

Row 6 of A250373

Links

R. H. Hardin, Table of n, a(n) for n = 1..135

Formula

Empirical: a(n) = (1/231)*n^11 + (151/210)*n^10 + (191/14)*n^9 + 81*n^8 + (1569/7)*n^7 + (703/2)*n^6 + (68657/210)*n^5 + (2941/21)*n^4 - (94/21)*n^3 + (371/15)*n^2 + (14918/385)*n + 1

Example

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

Crossrefs

Sequence in context: A059402 A252000 A251993 * A190833 A351676 A137261

Adjacent sequences: A250376 A250377 A250378 * A250380 A250381 A250382

Keyword

nonn

Author

R. H. Hardin, Nov 19 2014

Status

approved