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A172423 Period length 10: repeat 0,9,2,7,4,5,6,3,8,1. 3
0, 9, 2, 7, 4, 5, 6, 3, 8, 1, 0, 9, 2, 7, 4, 5, 6, 3, 8, 1, 0, 9, 2, 7, 4, 5, 6, 3, 8, 1, 0, 9, 2, 7, 4, 5, 6, 3, 8, 1, 0, 9, 2, 7, 4, 5, 6, 3, 8, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Also the decimal expansion of 103050709/1111111111.

LINKS

Table of n, a(n) for n=0..49.

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

FORMULA

a(2n) = A135033(n-1).

a(2n+1) = A096230(n+1).

a(n+2) = A172430(3*n).

G.f.: -x*(9+2*x+7*x^2+4*x^3+5*x^4+6*x^5+3*x^6+8*x^7+x^8) / ( (x-1)*(1+x)*(x^4+x^3+x^2+x+1)*(x^4-x^3+x^2-x+1) ).

a(n)=(1/5)*{(n mod 10)+4*[(n+1) mod 10]-2*[(n+2) mod 10]+2*[(n+3) mod 10]+2*[(n+6) mod 10]-2*[(n+7) mod 10]+4*[(n+8) mod 10]-4*[(n+9) mod 10]}, with n>=0 [From Paolo P. Lava, Feb 05 2010]

CROSSREFS

Sequence in context: A252898 A010537 A234371 * A104696 A086088 A231986

Adjacent sequences:  A172420 A172421 A172422 * A172424 A172425 A172426

KEYWORD

nonn,easy

AUTHOR

Paul Curtz, Feb 02 2010

STATUS

approved

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Last modified January 23 02:39 EST 2019. Contains 319365 sequences. (Running on oeis4.)