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!)
A256809 Number of (n+2)X(7+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 0 or 1 and no column sum 0 or 1 1

%I #4 Apr 10 2015 13:33:21

%S 12707,203129,3375943,53254665,845074953,13512239171,215464267564,

%T 3432996430917,54734222100688,872697161884847,13912483854824538,

%U 221795217415897043,3536009069533019771,56372932016438815229

%N Number of (n+2)X(7+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 0 or 1 and no column sum 0 or 1

%C Column 7 of A256810

%H R. H. Hardin, <a href="/A256809/b256809.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1

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

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

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

%Y Cf. A256810

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 10 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 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)