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

 

Logo

The OEIS is looking to hire part-time people to help edit core sequences, upload scanned documents, process citations, fix broken links, etc. - Neil Sloane, njasloane@gmail.com

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A070390 a(n) = 5^n mod 44. 1
1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5, 25, 37, 9, 1, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,1). [R. J. Mathar, Apr 20 2010]

FORMULA

a(n) = (1/50)*{157*(n mod 5)+357*[(n+1) mod 5]-43*[(n+2) mod 5]-123*[(n+3) mod 5]+37*[(n+4) mod 5]}, with n>=0. - Paolo P. Lava, Apr 16 2010

From R. J. Mathar, Apr 20 2010: (Start)

a(n) = a(n-5).

G.f.: ( -1-5*x-25*x^2-37*x^3-9*x^4 ) / ( (x-1)*(1+x+x^2+x^3+x^4) ). (End)

MATHEMATICA

PowerMod[5, Range[0, 90], 44] (* or *) LinearRecurrence[{0, 0, 0, 0, 1}, {1, 5, 25, 37, 9}, 90] (* Harvey P. Dale, Apr 21 2011 *)

PROG

(Sage) [power_mod(5, n, 44)for n in xrange(0, 87)] # Zerinvary Lajos, Nov 26 2009

(PARI) a(n) = lift(Mod(5, 44)^n); \\ Altug Alkan, Mar 18 2016

CROSSREFS

Sequence in context: A084967 A249827 A279541 * A018724 A070389 A098993

Adjacent sequences:  A070387 A070388 A070389 * A070391 A070392 A070393

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, May 12 2002

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified May 26 13:02 EDT 2017. Contains 287095 sequences.