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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, 229561369
OFFSET
1,1
COMMENTS
This sequence contains only prime numbers. - Paul Tek, Jun 10 2013
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
KEYWORD
more,nonn
AUTHOR
Reinhard Zumkeller, Nov 02 2001
EXTENSIONS
a(14)-a(16) from Paul Tek, Jun 10 2013
a(17) from Sean A. Irvine, Aug 31 2023
STATUS
approved