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A130657 Periodic (7 terms) 1 1 1 1 0 0 0. 0
1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..27.

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

FORMULA

u(n)=u(n+1)=u(n+2)=u(n+3)=1, u(n+4)=u(n+5)=u(n+6)=0 .

a(n)=(1/147)*{-17*(n mod 7)+4*[(n+1) mod 7]+4*[(n+2) mod 7]+25*[(n+3) mod 7]+4*[(n+4) mod 7]+4*[(n+5) mod 7]+4*[(n+6) mod 7]}, with n>=0. - Paolo P. Lava, Jul 18 2007

G.f.: -(1+x)*(1+x^2) / ( (x-1)*(1+x+x^2+x^3+x^4+x^5+x^6) ). - R. J. Mathar, Mar 01 2015

CROSSREFS

Sequence in context: A025447 A131078 A302203 * A185916 A084846 A285498

Adjacent sequences:  A130654 A130655 A130656 * A130658 A130659 A130660

KEYWORD

nonn,easy

AUTHOR

Paul Curtz, Jun 21 2007

STATUS

approved

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Last modified March 29 17:23 EDT 2020. Contains 333116 sequences. (Running on oeis4.)