Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A153909
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A153909 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 2 ones in any 2 X 2 X 2 subtriangle. +0
1
1, 2, 3, 10, 29, 170, 866, 8938, 80759, 1473212, 23518209, 758000366, 21390884981, 1218501715162, 60770817102548, 6118061305466866, 539278173702963911, 95952596838569547200, 14947904300936965181323, 4700556597989635565249354 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A004980 A034324 A121909 this_sequence A131764 A066706 A080022

Adjacent sequences: A153906 A153907 A153908 this_sequence A153910 A153911 A153912

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Jan 03 2009

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified December 6 22:55 EST 2009. Contains 170429 sequences.

AT&T Labs Research

Legal Notice
© 2009 AT&T Intellectual Property. All Rights Reserved.