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!)
A318074 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Aug 15 2018 13:20:16

%S 64,190,404,861,2195,9966,46884,184156,819263,3703730,15865269,

%T 69944965,310937380,1361781447,5998215467,26503896368,116659469704,

%U 513984726015,2266966511804,9989194862172,44021107304800,194059543279029

%N Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 7 of A318075.

%H R. H. Hardin, <a href="/A318074/b318074.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A318075.

%K nonn

%O 1,1

%A _R. H. Hardin_, Aug 15 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 April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)