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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A156641 13*(100^(n+1)-1)/99. 1
13, 1313, 131313, 13131313, 1313131313, 131313131313, 13131313131313, 1313131313131313, 131313131313131313, 13131313131313131313, 1313131313131313131313, 131313131313131313131313 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..100

Index entries for linear recurrences with constant coefficients, signature (101,-100).

FORMULA

G.f.: 13*x / ( (1-100*x)*(1-x) ).

a(n) = 13*A094028(n-1).

EXAMPLE

For n=0, a(0)=13; n=1, a(1)=1313; n=2, a(2)=131313; n=3, a(3)=13131313

MATHEMATICA

Table[FromDigits[PadLeft[{1, 3}, 2n, {1, 3}]], {n, 15}] (* Harvey P. Dale, Jul 23 2011 *)

PROG

(MAGMA) [13*(100^(n+1)-1)/99: n in [0..15]]

CROSSREFS

Cf. A094028

Sequence in context: A220619 A178560 A091781 * A300592 A221690 A197630

Adjacent sequences:  A156638 A156639 A156640 * A156642 A156643 A156644

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Feb 15 2009

EXTENSIONS

Offset changed from 1 to 0

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 23 12:31 EST 2021. Contains 340385 sequences. (Running on oeis4.)