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!)
A317889 Number of nXn 0..1 arrays with every element unequal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0

%I #4 Aug 10 2018 10:28:29

%S 0,1,4,82,6193,1184196,580702029,736219004144,2388442704194600,

%T 19885239768168130210

%N Number of nXn 0..1 arrays with every element unequal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Diagonal of A317896.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317896.

%K nonn

%O 1,3

%A _R. H. Hardin_, Aug 10 2018

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 March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)