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A018194 Number of steps for S(S(..S(n)..)) to converge, where S is the Kempner function A002034. 5
1, 1, 1, 1, 1, 2, 1, 2, 3, 2, 1, 2, 1, 2, 2, 3, 1, 3, 1, 2, 2, 2, 1, 2, 3, 2, 4, 2, 1, 2, 1, 3, 2, 2, 2, 3, 1, 2, 2, 2, 1, 2, 1, 2, 3, 2, 1, 3, 3, 3, 2, 2, 1, 4, 2, 2, 2, 2, 1, 2, 1, 2, 2, 3, 2, 2, 1, 2, 2, 2, 1, 3, 1, 2, 3, 2, 2, 2, 1, 3, 4, 2, 1, 2, 2, 2, 2, 2, 1, 3, 2, 2, 2, 2, 2, 3, 1, 3, 2, 3, 1, 2, 1, 2, 2, 2, 1, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

COMMENTS

a(A046022(n)) = 1. [Reinhard Zumkeller, Mar 09 2012]

REFERENCES

Henry Ibstedt, "Smarandache Iterations", Smarandache Notions Journal, (submitted), 1996.

LINKS

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

PROG

(Haskell)

a018194 n = 1 + length (takeWhile (/= 0) $ zipWith (-) ks $ tail ks)

   where ks = iterate a002034 n

-- Reinhard Zumkeller, Mar 09 2012

CROSSREFS

Cf. A002034.

Sequence in context: A128065 A329744 A277889 * A338630 A286281 A229830

Adjacent sequences:  A018191 A018192 A018193 * A018195 A018196 A018197

KEYWORD

nonn

AUTHOR

Henry Ibstedt (Glimminge 2036, 28060 Broby, Sweden)

EXTENSIONS

Corrected and extended by David W. Wilson May 15 1997

STATUS

approved

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Last modified May 11 16:38 EDT 2021. Contains 343803 sequences. (Running on oeis4.)