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.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A258680 Number of (n+2)X(7+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum 1

%I #4 Jun 07 2015 09:31:11

%S 5744640,125888400,4096960560,133333061904,3662507469600,

%T 100604912040000,3022970884380000,90834063491610000,

%U 2620890308853171600,75622137191681873296,2230153722476731923648,65768911202153889517824

%N Number of (n+2)X(7+2) 0..1 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum

%C Column 7 of A258681

%H R. H. Hardin, <a href="/A258680/b258680.txt">Table of n, a(n) for n = 1..13</a>

%e Some solutions for n=1

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

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

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

%Y Cf. A258681

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 07 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.

Last modified May 26 19:59 EDT 2024. Contains 372844 sequences. (Running on oeis4.)