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!)
A302531 Number of 5Xn 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1

%I

%S 0,61,497,902,3683,23909,128242,465323,1918153,10153650,48825739,

%T 206962001,913773720,4366054069,20367538805,90798363146,409867362675,

%U 1900191504221,8749921654714,39674026618581,180520404483627

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

%C Row 5 of A302528.

%H R. H. Hardin, <a href="/A302531/b302531.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A302528.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 09 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 January 28 03:20 EST 2022. Contains 350654 sequences. (Running on oeis4.)