Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A099456
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A099456 Expansion of 1/(1-4x+5x^2). +0
5
1, 4, 11, 24, 41, 44, -29, -336, -1199, -3116, -6469, -10296, -8839, 16124, 108691, 354144, 873121, 1721764, 2521451, 1476984, -6699319, -34182196, -103232189, -242017776, -451910159, -597551756, -130656229, 2465133864 (list; graph; listen)
OFFSET

0,2

COMMENT

Associated to the knot 9_44 by the modified Chebyshev transform A(x)-> (1/(1+x^2)^2)A(x/(1+x^2)). See A099457 and A099458.

LINKS

The Rolfsen Knot Table

FORMULA

a(n)=sum{k=0..floor(n/2), binomial(n-k, k)(-5)^k*4^(n-2k)}.

CROSSREFS

Sequence in context: A008070 A008096 A008209 this_sequence A008069 A047950 A008259

Adjacent sequences: A099453 A099454 A099455 this_sequence A099457 A099458 A099459

KEYWORD

easy,sign

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Oct 16 2004

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 August 29 17:54 EDT 2008. Contains 143238 sequences.


AT&T Labs Research