login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A304691 Number of n X n 0..1 arrays with every element unequal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero. 0

%I

%S 0,7,56,918,37050,2753404,389403912,111681916203,65358224695742

%N Number of n X n 0..1 arrays with every element unequal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

%C Diagonal of A304697.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A304697.

%K nonn

%O 1,2

%A _R. H. Hardin_, May 17 2018

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 27 06:19 EDT 2021. Contains 348271 sequences. (Running on oeis4.)