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

 

Logo

Many excellent designs for a new banner were submitted. We will use the best of them in rotation.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A127190 E.g.f.: sqrt((1+2*x)/(1+4*x)). 0
1, -1, 7, -75, 1089, -20025, 446535, -11715795, 353743425, -12084751665, 460905128775, -19414191656475, 895154327661825, -44844879530075625, 2425592881954016775, -140881250370301315875, 8745197742014671562625, -577792180264444615094625, 40483044280613870034474375 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..18.

CROSSREFS

Sequence in context: A157706 A197763 A202251 * A121316 A220215 A066302

Adjacent sequences:  A127187 A127188 A127189 * A127191 A127192 A127193

KEYWORD

sign

AUTHOR

N. J. A. Sloane, Mar 26 2007

STATUS

approved

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

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

Last modified April 17 20:01 EDT 2014. Contains 240655 sequences.