A070360 - OEIS

A070360

a(n) = 3^n mod 38.

1, 3, 9, 27, 5, 15, 7, 21, 25, 37, 35, 29, 11, 33, 23, 31, 17, 13, 1, 3, 9, 27, 5, 15, 7, 21, 25, 37, 35, 29, 11, 33, 23, 31, 17, 13, 1, 3, 9, 27, 5, 15, 7, 21, 25, 37, 35, 29, 11, 33, 23, 31, 17, 13, 1, 3, 9, 27, 5, 15, 7, 21, 25, 37, 35, 29, 11, 33, 23, 31, 17, 13, 1, 3, 9, 27, 5

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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 (1,0,0,0,0,0,0,0,-1,1).

FORMULA

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

a(n) = a(n-1) - a(n-9) + a(n-10).

G.f.: ( -1-2*x-6*x^2-18*x^3+22*x^4-10*x^5+8*x^6-14*x^7-4*x^8-13*x^9 ) / ( (x-1)*(1+x)*(x^2-x+1)*(x^6-x^3+1) ). (End)

a(n) = a(n-18). - G. C. Greubel, Mar 09 2016

MATHEMATICA