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!)
A153970 Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 9 ones in any 5 X 5 X 5 subtriangle. 0

%I #3 Mar 31 2012 12:35:21

%S 1,2,2,4,7,12,22,77,142,532,1881,6680,23965,163600,576849,3866824,

%T 26635009,176366633,1204710337,15393505413,104674234457,1334666498849,

%U 17456897665295,221752333314343,2885843552520634,70795502834846238

%N Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 9 ones in any 5 X 5 X 5 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_ Jan 03 2009

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 June 25 04:03 EDT 2024. Contains 373697 sequences. (Running on oeis4.)