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!)
A281658 Number of 6Xn 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. 0

%I #3 Jan 26 2017 07:25:05

%S 0,20444,982206,32771472,1205962480,37763465272,1154703692514,

%T 34504258166264,1006968332779830,28949112532504572

%N Number of 6Xn 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 Row 6 of A281653.

%e Some solutions for n=2

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

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

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

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

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

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

%Y Cf. A281653.

%K nonn

%O 1,2

%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 April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)