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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
OFFSET
1,5
COMMENTS
a(n) = 1 iff A192189(n) is prime.
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladimir Shevelev, Jun 25 2011
STATUS
approved