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A065374 Smallest k such that f(f(...f(k))) > 1, where f(k) = A065371(k) is iterated n times. 4
5, 13, 29, 43, 61, 307, 383, 2689, 9209, 14897, 83557, 274679, 598333, 3516973, 11295673, 24104629 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

This sequence contains only prime numbers. - Paul Tek, Jun 10 2013

LINKS

Table of n, a(n) for n=1..16.

Paul Tek, C++ program for this sequence

EXAMPLE

a(2) = 13 because A065372(13) = 3 and A065372(i) = 1 for i < 13.

After 10 iterations of A065371 we have a sequence starting with 14896 1's followed by 6, so a(10)= 14897.

CROSSREFS

Cf. A065371, A065372, A065373.

Sequence in context: A163251 A247177 A146286 * A130066 A206258 A270106

Adjacent sequences:  A065371 A065372 A065373 * A065375 A065376 A065377

KEYWORD

more,nonn

AUTHOR

Reinhard Zumkeller, Nov 02 2001

EXTENSIONS

a(14)-a(16) from Paul Tek, Jun 10 2013

STATUS

approved

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Last modified August 14 05:20 EDT 2022. Contains 356110 sequences. (Running on oeis4.)