A095687 - OEIS

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A095687

Numbers n such that n-th Pisano number = 6*n.

0, 10, 50, 250, 1250, 6250, 31250, 156250, 781250, 3906250, 19531250, 97656250, 488281250, 2441406250, 12207031250, 61035156250, 305175781250, 1525878906250, 7629394531250, 38146972656250, 190734863281250

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OFFSET

1,2

COMMENTS

Period of Fibonacci sequence(mod m)<=6*m.

Effectively the same as A020699 and A020729 apart from the initial terms. [From Carl R. White, Sep 22 2009]

LINKS

Table of n, a(n) for n=1..21.

K. S. Brown, Periods of Fibonacci Sequences Mod m

FORMULA

a(0) = 0, a(1) = 10, a(n) = 5*a(n-1); a(n) = sgn(n)*2*5^n [From Carl R. White, Sep 22 2009]

CROSSREFS

Cf. A001175.

Sequence in context: A192019 A201210 A003207 * A204272 A220149 A154410

Adjacent sequences: A095684 A095685 A095686 * A095688 A095689 A095690

KEYWORD

nonn

AUTHOR

Lekraj Beedassy, Jul 05 2004

EXTENSIONS

More terms from Carl R. White, Sep 22 2009

STATUS

approved