Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A018217
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A018217 Sum(C(j)*(n-j)*4^(n-j),j=0..n-1), C = Catalan numbers. +0
1
0, 4, 36, 232, 1300, 6744, 33320, 159184, 742068, 3395320, 15308920, 68213424, 300999816, 1317415792, 5726300880, 24742452128, 106357582324, 455122855224, 1939780103768, 8238185701360, 34876073003352 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A144888 A054773 A074434 this_sequence A003488 A119579 A075144

Adjacent sequences: A018214 A018215 A018216 this_sequence A018218 A018219 A018220

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Peter Winkler (pw(AT)bell-labs.com)

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 November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research

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