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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A037771 Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,2,1. 0
3, 30, 302, 3021, 30213, 302130, 3021302, 30213021, 302130213, 3021302130, 30213021302, 302130213021, 3021302130213, 30213021302130, 302130213021302, 3021302130213021 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..16.

Index entries for linear recurrences with constant coefficients, signature (10,0,0,1,-10).

FORMULA

a(n)=10*a(n-1)+(1/4)*{2*(n mod 4)-[(n+1) mod 4]+4*[(n+2) mod 4]-[(n+3) mod 4]}, with a(0)=0 [From Paolo P. Lava, Jul 30 2009]

G.f. x*(3+2*x^2+x^3) / ( (x-1)*(10*x-1)*(1+x)*(x^2+1) ). - R. J. Mathar, Aug 04 2013

CROSSREFS

Sequence in context: A073557 A037764 A037652 * A037659 A131586 A163475

Adjacent sequences:  A037768 A037769 A037770 * A037772 A037773 A037774

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

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 April 24 04:48 EDT 2019. Contains 322412 sequences. (Running on oeis4.)