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!)
A204874 Number of (n+1)X7 0..3 arrays with the permanents of all 2X2 subblocks equal and nonzero 1

%I #5 Mar 31 2012 12:37:03

%S 36285,1174669,11644559,320519921,3677014705,94493071327,

%T 1170722541163,28674816027923,375190755400931,8831187451636669,

%U 120712083104557267,2744638222500107219,38929895065086949097,858589315995824785575

%N Number of (n+1)X7 0..3 arrays with the permanents of all 2X2 subblocks equal and nonzero

%C Column 6 of A204876

%H R. H. Hardin, <a href="/A204874/b204874.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 20 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 April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)