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A160696 Largest k such that k^2 divides prime(n)+1. 5
1, 2, 1, 2, 2, 1, 3, 2, 2, 1, 4, 1, 1, 2, 4, 3, 2, 1, 2, 6, 1, 4, 2, 3, 7, 1, 2, 6, 1, 1, 8, 2, 1, 2, 5, 2, 1, 2, 2, 1, 6, 1, 8, 1, 3, 10, 2, 4, 2, 1, 3, 4, 11, 6, 1, 2, 3, 4, 1, 1, 2, 7, 2, 2, 1, 1, 2, 13, 2, 5, 1, 6, 4, 1, 2, 8, 1, 1, 1, 1, 2, 1, 12, 1, 2, 2, 15, 1, 1, 4, 6, 4, 2, 2, 10, 6, 1, 3, 2, 1, 2, 3, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(A049097(n)) = 1; a(A049098(n)) > 1;

A160697 and A160698 give record values and where they occur;

a(n) = A000188(A008864(n)).

LINKS

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

CROSSREFS

Sequence in context: A227899 A208244 A272171 * A152545 A256660 A109967

Adjacent sequences:  A160693 A160694 A160695 * A160697 A160698 A160699

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 24 2009

STATUS

approved

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Last modified January 18 13:30 EST 2020. Contains 331007 sequences. (Running on oeis4.)