A235249 Fixed point when A001175 (Pisano periods) is iterated with starting value n.

1, 24, 24, 24, 120, 24, 24, 24, 24, 120, 120, 24, 24, 24, 120, 24, 24, 24, 24, 120, 24, 120, 24, 24, 600, 24, 24, 24, 24, 120, 120, 24, 120, 24, 120, 24, 24, 24, 24, 120, 120, 24, 120, 120, 120, 24, 24, 24, 24, 600, 24, 24, 24, 24, 120, 24, 24, 24, 24, 120

Offset

1,2

Comments

Are the powers of 5 (together with 2) the indices of records in this sequence? - Charles R Greathouse IV, Aug 11 2022

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

J. D. Fulton and W. L. Morris, On arithmetical functions related to the Fibonacci numbers, Acta Arithmetica, 16 (1969), 105-110.

Wikipedia, Pisano period

Formula

a(n) = 24*5^(A001179(n)-1) for n > 1.

A001175(a(n)) = a(n).

Prog

(Haskell)
a235249 n = if y == n then n else a235249 y  where y = a001175 n

Crossrefs

Cf. A001175, A001179.

Sequence in context: A010863 A362116 A217140 * A115028 A099543 A188311

Adjacent sequences: A235246 A235247 A235248 * A235250 A235251 A235252

Keyword

nonn

Author

Reinhard Zumkeller, Jan 15 2014

Status

approved