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!)
A224575 Number of (n+5) X 11 0..1 matrices with each 6 X 6 subblock idempotent. 1

%I #8 Jul 21 2014 01:15:32

%S 25769,7386,7884,8714,9480,10086,10561,12373,15413,19404,24072,29230,

%T 34734,41919,52000,65945,84434,107959,136853,172795,218668,278353,

%U 356397,457838,588032,754025,965735,1236991,1586155,2036626,2617144,3363506

%N Number of (n+5) X 11 0..1 matrices with each 6 X 6 subblock idempotent.

%C Column 6 of A224577.

%H R. H. Hardin, <a href="/A224575/b224575.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 3*a(n-1) -3*a(n-2) +a(n-3) +2*a(n-6) -5*a(n-7) +4*a(n-8) -a(n-9) -a(n-12) +2*a(n-13) -a(n-14), for n>18.

%e Some solutions for n=2:

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 10 2013

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 09:41 EDT 2024. Contains 371935 sequences. (Running on oeis4.)