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!)
A223674 Number of 7Xn 0..1 arrays with rows, diagonals and antidiagonals unimodal 1

%I #4 Mar 25 2013 09:41:26

%S 128,16384,371641,2343189,8052573,21347949,51831694,124050234,

%T 299298122,726344042,1747724083,4106362589,9335920794,20497890026,

%U 43553671579,89873040155,180673406871,354644672067,680755779412,1279369459830

%N Number of 7Xn 0..1 arrays with rows, diagonals and antidiagonals unimodal

%C Row 7 of A223669

%H R. H. Hardin, <a href="/A223674/b223674.txt">Table of n, a(n) for n = 1..33</a>

%e Some solutions for n=3

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 25 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 17 23:23 EDT 2024. Contains 371767 sequences. (Running on oeis4.)