login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A096883 Expansion of (1+10x)/(1-101x^2). 1
1, 10, 101, 1010, 10201, 102010, 1030301, 10303010, 104060401, 1040604010, 10510100501, 105101005010, 1061520150601, 10615201506010, 107213535210701, 1072135352107010, 10828567056280801, 108285670562808010 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

FORMULA

a(n)=9a(n-1)+10a(n-2)+101^floor((n-2)/2); a(n)=sum{k=0..floor(n/2), binomial(floor(n/2), k)10^(n-2k) }.

CROSSREFS

Cf. A004663, A026383, A016116, A096881, A096882.

Sequence in context: A105032 A123522 A056830 * A033128 A094945 A190480

Adjacent sequences:  A096880 A096881 A096882 * A096884 A096885 A096886

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Jul 14 2004

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 14 11:17 EST 2012. Contains 205623 sequences.