login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A155360 Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 2,2 3,0 3,1 3,2 polyhexes in any orientation on a planar nXnXn triangular grid. 0

%I

%S 1,4,10,22,40,135,924,5789,30931,175032,1467331,18452914,249998893,

%T 3424732727,53967206180,1112604199677,29667024358722,907210467221174

%N Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 2,2 3,0 3,1 3,2 polyhexes in any orientation on a planar nXnXn triangular grid.

%C Same series for 0,0 1,0 2,0 2,1 2,2 3,0 3,2 polyhexes.

%e Maximal 10 X 10 X 10 example

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

%e ...........1.1

%e ..........1.0.1

%e .........0.1.1.1

%e ........0.0.0.0.0

%e .......0.1.1.1.0.0

%e ......1.0.1.0.1.0.1

%e .....1.1.0.1.1.0.1.1

%e ....1.0.1.0.1.0.1.0.1

%e ...1.1.1.0.0.0.0.1.1.1

%K nonn

%O 3,2

%A _R. H. Hardin_ Jan 22 2009

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 October 28 03:12 EDT 2021. Contains 348308 sequences. (Running on oeis4.)