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!)
A281652 Number of nX6 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. 1

%I

%S 28,10512,519656,23075928,955490042,37763465272,1449940771656,

%T 54481157985120,2013987013843948,73499046502446216,

%U 2654628744412422502,95064295609902663936,3380059487036411031246,119451269294771081739640

%N Number of nX6 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

%C Column 6 of A281653.

%H R. H. Hardin, <a href="/A281652/b281652.txt">Table of n, a(n) for n = 1..16</a>

%e Some solutions for n=2

%e ..0..1..2..2..1..0. .0..1..0..1..0..1. .0..1..0..2..1..1. .0..1..2..0..1..2

%e ..2..0..1..2..0..1. .1..2..0..2..1..1. .1..2..1..0..2..0. .0..1..0..0..2..0

%Y Cf. A281653.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 26 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 February 3 15:25 EST 2023. Contains 360035 sequences. (Running on oeis4.)