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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A137213 First differences of A137212. 0
0, 1, 4, 15, 52, 173, 560, 1779, 5576, 17305, 53308, 163287, 497980, 1513541, 4587944, 13878075, 41910032, 126395953, 380795380, 1146267039, 3448170436, 10367130845, 31156000928, 93599839107, 281117798360, 844121793481 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

LINKS

Index to sequences with linear recurrences with constant coefficients, signature (5,-5,-3).

FORMULA

O.g.f.: 1/(x^2+2*x-1)-1/(3*x-1) = -x*(-1+x) / ( (3*x-1)*(x^2+2*x-1) ). a(n)= 3^n-A000129(n+1). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 17 2008

CROSSREFS

Cf. A132894.

Sequence in context: A005492 A003013 A117202 * A027853 A132894 A117917

Adjacent sequences:  A137210 A137211 A137212 * A137214 A137215 A137216

KEYWORD

nonn

AUTHOR

Paul Curtz (bpcrtz(AT)free.fr), Mar 06 2008

EXTENSIONS

More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 17 2008

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 17 00:09 EST 2012. Contains 205978 sequences.