Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A049681
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A049681 a(n)=(L(2n)-L(n))/2, where L=A000032 (the Lucas sequence). +0
1
0, 1, 2, 7, 20, 56, 152, 407, 1080, 2851, 7502, 19702, 51680, 135461, 354902, 929567, 2434320, 6374236, 16689752, 43697227, 114405500, 299525051, 784179002, 2053027082, 5374926720, 14071792681 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A018033 A000149 A080041 this_sequence A027120 A094982 A007460

Adjacent sequences: A049678 A049679 A049680 this_sequence A049682 A049683 A049684

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

EXTENSIONS

Corrected by Franklin T. Adams-Watters, Oct 25 2006

Corrected by T. D. Noe (noe(AT)sspectra.com), Nov 01 2006

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 17 23:40 EST 2009. Contains 171025 sequences.

AT&T Labs Research

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