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!)
A018816 Number of lines through exactly 9 points of an n X n grid of points. 1

%I #14 Nov 27 2017 03:19:58

%S 0,0,0,0,0,0,0,0,0,20,4,4,4,4,4,4,4,40,84,56,20,20,20,20,20,124,244,

%T 380,300,204,92,92,92,228,380,548,732,628,508,372,220,556,924,1324,

%U 1756,2220,1964,1676,1356,1204,1036,1268,1516,1780,2060,1908,1740,2252,2796,3372

%N Number of lines through exactly 9 points of an n X n grid of points.

%H Seiichi Manyama, <a href="/A018816/b018816.txt">Table of n, a(n) for n = 0..1000</a>

%H S. Mustonen, <a href="http://www.survo.fi/papers/PointsInGrid.pdf">On lines and their intersection points in a rectangular grid of points</a>

%K nonn

%O 0,10

%A _David W. Wilson_

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 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)