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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A170743 G.f.: (1+x)/(1-23*x). 50
1, 24, 552, 12696, 292008, 6716184, 154472232, 3552861336, 81715810728, 1879463646744, 43227663875112, 994236269127576, 22867434189934248, 525950986368487704, 12096872686475217192, 278228071788929995416, 6399245651145389894568, 147182649976343967575064 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Kenny Lau, Table of n, a(n) for n = 0..733

Index entries for linear recurrences with constant coefficients, signature (23).

FORMULA

a(n) = Sum_{k=0..n} A097805(n,k)*(-1)^(n-k)*24^k. - Philippe Deléham, Dec 04 2009

a(0) = 1; for n>0, a(n) = 24*23^(n-1). - Vincenzo Librandi, Dec 05 2009

MATHEMATICA

CoefficientList[Series[(1+x)/(1-23x), {x, 0, 20}], x] (* or *) LinearRecurrence[ {23}, {1, 24}, 20] (* or *) Join[{1}, NestList[ 23#&, 24, 20]] (* Harvey P. Dale, Oct 21 2015 *)

PROG

(Python) for i in range(1001):print(i, 24*23**(i-1) if i>0 else 1) # Kenny Lau, Aug 02 2017

(PARI) Vec((1+x)/(1-23*x) + O(x^18)) \\ Felix Fröhlich, Aug 02 2017

CROSSREFS

Cf. A097805.

Sequence in context: A170609 A170657 A170705 * A218726 A203487 A007110

Adjacent sequences:  A170740 A170741 A170742 * A170744 A170745 A170746

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 04 2009

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 July 21 02:02 EDT 2019. Contains 325189 sequences. (Running on oeis4.)