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!)
A122850 Exponential Riordan array (1, sqrt(1+2x)-1). 2
1, 0, 1, 0, -1, 1, 0, 3, -3, 1, 0, -15, 15, -6, 1, 0, 105, -105, 45, -10, 1, 0, -945, 945, -420, 105, -15, 1, 0, 10395, -10395, 4725, -1260, 210, -21, 1, 0, -135135, 135135, -62370, 17325, -3150 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,8

COMMENTS

Inverse of number triangle A122848. Entries are Bessel polynomial coefficients. Row sums are A000806.

LINKS

Table of n, a(n) for n=0..41.

FORMULA

T(n,k)=(-1)^(n-k)*A132062(n,k).- From Philippe Deléham, Nov 06 2011

EXAMPLE

Triangle begins 1, 0, 1, 0, -1, 1, 0, 3, -3, 1, 0, -15, 15, -6, 1, 0, 105, -105, 45, -10, 1, 0, -945, 945, -420, 105, -15, 1

CROSSREFS

Cf. A001497.

Sequence in context: A135009 A092747 A184962 * A132062 A065547 A143333

Adjacent sequences:  A122847 A122848 A122849 * A122851 A122852 A122853

KEYWORD

easy,sign,tabl

AUTHOR

Paul Barry, Sep 14 2006

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.