login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A236887 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock equal 1

%I

%S 245,975,4129,19005,91617,464737,2442897,13272897,73869017,419482609,

%T 2416657937,14082031833,82711630513,488789176177,2900660394265,

%U 17268508407633,103027230851025,615687930858265,3683409663312753

%N Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock equal

%C Column 2 of A236893

%H R. H. Hardin, <a href="/A236887/b236887.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 14*a(n-1) -36*a(n-2) -311*a(n-3) +1782*a(n-4) -328*a(n-5) -15312*a(n-6) +26368*a(n-7) +28560*a(n-8) -103120*a(n-9) +42336*a(n-10) +79216*a(n-11) -66656*a(n-12) -8256*a(n-13) +20352*a(n-14) -4608*a(n-15)

%e Some solutions for n=5

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 01 2014

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 19 18:30 EDT 2022. Contains 356229 sequences. (Running on oeis4.)