login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A097953 Boustrophedon transform of ((-2)^n+0^n)/2. 0
1, 0, 1, 1, 1, 15, 11, 201, 561, 4575, 25171, 187801, 1400521, 11694735, 103903931, 993285801, 10113814881, 109470594495, 1254389104291, 15173016742201, 193187969483641, 2582736821247855, 36172850924874251 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

COMMENTS

Inverse binomial transform of A062272.

LINKS

Table of n, a(n) for n=0..22.

FORMULA

E.g.f.: (1+exp(-2x))(sec(x)+tan(x))/2.

a(n) ~ n! * (1+exp(-Pi)) * (2/Pi)^(n+1). - Vaclav Kotesovec, Sep 29 2013

MATHEMATICA

CoefficientList[Series[(1+1/E^(2*x))*(1+Sin[x])/Cos[x]/2, {x, 0, 20}], x]* Range[0, 20]! (* Vaclav Kotesovec, Sep 29 2013 *)

CROSSREFS

Cf. A000734.

Sequence in context: A013430 A131082 A296818 * A200522 A273445 A195533

Adjacent sequences:  A097950 A097951 A097952 * A097954 A097955 A097956

KEYWORD

nonn

AUTHOR

Paul Barry, Jan 21 2005

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 22 07:39 EST 2020. Contains 331139 sequences. (Running on oeis4.)