Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A103456
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A103456 0^n+10^n-1. +0
1
1, 9, 99, 999, 9999, 99999, 999999, 9999999, 99999999, 999999999, 9999999999, 99999999999, 999999999999, 9999999999999, 99999999999999, 999999999999999, 9999999999999999, 99999999999999999, 999999999999999999 (list; graph; listen)
OFFSET

0,2

COMMENT

A transform of 10^n under the matrix A103452.

FORMULA

G.f.: (1-2x+10x^2)/((1-x)(1-10x)); a(n)=sum{k=0..n, A103452(n, k)10^k}; a(n)=sum{k=0..n, (2*0^(n-k)-1)*0^(k(n-k))10^k}.

a(n)=A002283(n), n>0. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 30 2008]

CROSSREFS

Adjacent sequences: A103453 A103454 A103455 this_sequence A103457 A103458 A103459

Sequence in context: A108908 A116260 A002283 this_sequence A015685 A051581 A080291

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Feb 06 2005

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 October 11 13:47 EDT 2008. Contains 144830 sequences.


AT&T Labs Research