This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A250086 Number of length 5+5 0..n arrays with every six consecutive terms having the maximum of some two terms equal to the minimum of the remaining four terms 1

%I

%S 442,11519,117828,706561,3032302,10361063,30011560,76692849,177624322,

%T 380016703,761591084,1444917201,2616462070,4551355783,7645002704,

%U 12452793505,19739306442,30538524991,46226743444,68609982305

%N Number of length 5+5 0..n arrays with every six consecutive terms having the maximum of some two terms equal to the minimum of the remaining four terms

%C Row 5 of A250081

%H R. H. Hardin, <a href="/A250086/b250086.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = (1/63)*n^9 + (121/84)*n^8 + (108/7)*n^7 + (166/3)*n^6 + (469/5)*n^5 + (1199/12)*n^4 + (5753/63)*n^3 + (2659/42)*n^2 + (2146/105)*n + 1

%e Some solutions for n=3

%e ..2....0....0....2....1....1....0....2....2....1....2....2....0....3....1....3

%e ..3....2....1....3....3....2....1....0....0....0....2....2....2....0....2....0

%e ..0....1....3....0....2....2....3....3....1....0....2....0....0....3....0....3

%e ..0....1....1....1....2....3....2....0....3....3....2....3....0....1....2....0

%e ..0....1....1....0....2....1....1....0....2....0....3....1....3....3....0....0

%e ..0....3....1....0....3....1....3....2....1....3....3....1....0....1....0....0

%e ..1....1....2....0....1....1....1....0....2....1....3....1....0....1....0....3

%e ..0....1....0....0....3....1....1....0....1....0....0....1....2....1....3....2

%e ..1....1....3....2....3....1....2....3....1....0....2....0....1....2....3....0

%e ..2....1....2....3....2....1....0....2....1....0....2....1....0....0....2....3

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 11 2014

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 13 06:26 EST 2019. Contains 329968 sequences. (Running on oeis4.)