Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A087449
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A087449 n4^(n-1)+2*4^n/3+1/3. +0
2
1, 4, 19, 91, 427, 1963, 8875, 39595, 174763, 764587, 3320491, 14330539, 61516459, 262843051, 1118481067, 4742359723, 20043180715, 84467690155, 355050629803, 1488921995947, 6230565890731, 26021775190699, 108485147273899 (list; graph; listen)
OFFSET

0,2

COMMENT

Binomial transform of A064017.

FORMULA

G.f.: (1-5x+7x^2)/((1-x)(1-4x)^2); a(n)=A002697(n)+A007583(n).

CROSSREFS

Sequence in context: A084155 A015530 A010907 this_sequence A004253 A151253 A121179

Adjacent sequences: A087446 A087447 A087448 this_sequence A087450 A087451 A087452

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Sep 05 2003

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 30 13:13 EST 2009. Contains 167758 sequences.


AT&T Labs Research