The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A203883 Number of (n+1)X5 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements 1

%I #5 Mar 31 2012 12:36:58

%S 1399489,222645367,39572771665,7265109130279,1337957259758497,

%T 247090069595954263,45601045546133880817,8420752441494326059399,

%U 1554515329791272083118401,287024986300394858824793527

%N Number of (n+1)X5 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements

%C Column 4 of A203887

%H R. H. Hardin, <a href="/A203883/b203883.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 115*a(n-1) +17016*a(n-2) -763308*a(n-3) -1177416*a(n-4) +49714560*a(n-5) +35870688*a(n-6) -153031680*a(n-7)

%e Some solutions for n=4

%e ..4..4..1..1..1....2..2..0..5..1....5..3..5..6..3....2..4..1..5..0

%e ..6..4..4..1..0....5..2..2..0..5....6..5..0..5..6....2..2..4..1..5

%e ..2..6..4..4..1....6..5..2..2..0....1..6..5..4..5....5..2..2..4..1

%e ..2..2..6..4..4....4..6..5..2..2....6..2..6..5..3....4..5..2..2..4

%e ..2..3..2..6..4....1..4..6..5..2....5..6..0..6..5....0..4..5..2..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 07 2012

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 June 18 04:26 EDT 2024. Contains 373468 sequences. (Running on oeis4.)