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!)
A254848 Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum one and no antidiagonal sum two 1

%I #4 Feb 08 2015 11:30:18

%S 576,1369,2916,6889,16900,42436,103684,250000,595984,1447209,3541924,

%T 8761600,21399876,52186176,126067984,306915361,746710276,1830556225,

%U 4462774416,10904371776,26485609536,64593747409,157115518884

%N Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum one and no antidiagonal sum two

%C Column 2 of A254854

%H R. H. Hardin, <a href="/A254848/b254848.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 08 2015

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 25 13:27 EDT 2024. Contains 371971 sequences. (Running on oeis4.)