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!)
A302958 Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1

%I

%S 0,1172,164916,12365841,1212025201,130376252119,13578993819785,

%T 1403559107071889,145479455454006812,15089882967228651401,

%U 1564791955810116030473,162255388684026120105462

%N Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Row 7 of A302953.

%H R. H. Hardin, <a href="/A302958/b302958.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

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

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

%Y Cf. A302953.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 16 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 August 5 15:15 EDT 2021. Contains 346472 sequences. (Running on oeis4.)