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A192190 Degree of A192189(n) (polynomial-like numbers) in term of number derivatives: number of A003415-iterations up to reaching 0. 2
0, 1, 1, 1, 2, 1, 3, 2, 1, 1, 4, 1, 1, 3, 2, 1, 3, 1, 1, 5, 2, 1, 4, 1, 2, 1, 4, 1, 5, 1, 3, 2, 1, 1, 6, 2, 1, 2, 1, 1, 2, 1, 2, 1, 3, 1, 3, 6, 1, 1, 1, 2, 1, 1, 1, 2, 2, 3, 1, 5, 2, 1, 1, 4, 1, 2, 3, 1, 1, 2, 1, 1, 2, 4, 1, 6, 1, 2, 7, 1, 1, 2, 3, 1, 1, 1, 1, 3, 2, 5, 3, 1, 2, 5, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

a(n) = 1 iff A192189(n) is prime.

LINKS

Table of n, a(n) for n=1..95.

CROSSREFS

Cf. A003415, A038554, A192082, A192189.

Sequence in context: A165003 A165011 A213883 * A272729 A064034 A231635

Adjacent sequences:  A192187 A192188 A192189 * A192191 A192192 A192193

KEYWORD

nonn

AUTHOR

Vladimir Shevelev, Jun 25 2011

STATUS

approved

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Last modified February 20 13:40 EST 2020. Contains 332077 sequences. (Running on oeis4.)