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!)
A320407 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Oct 12 2018 12:39:29

%S 32,257,1970,18725,191615,1957026,19677729,199877194,2025592349,

%T 20591906814,209152278873,2125269466703,21596517936302,

%U 219473499133689,2230457205782323,22667637795146693,230368898318395100

%N Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 6 of A320409.

%H R. H. Hardin, <a href="/A320407/b320407.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A320409.

%K nonn

%O 1,1

%A _R. H. Hardin_, Oct 12 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 February 22 12:20 EST 2024. Contains 370255 sequences. (Running on oeis4.)