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!)
A297518 Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s. 1

%I #4 Dec 31 2017 09:53:36

%S 13,529,5079,85843,1671315,25184119,424461759,7287075949,119542912709,

%T 2002902791701,33647370739993,560607123996981,9377445295667227,

%U 156927250471302049,2622103739185322411,43845148158283369263

%N Number of nX7 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 3 neighboring 1s.

%C Column 7 of A297519.

%H R. H. Hardin, <a href="/A297518/b297518.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A297519.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 31 2017

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 24 19:56 EDT 2024. Contains 371963 sequences. (Running on oeis4.)