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A077066 Squarefree kernel of prime(n) + 1. 3
3, 2, 6, 2, 6, 14, 6, 10, 6, 30, 2, 38, 42, 22, 6, 6, 30, 62, 34, 6, 74, 10, 42, 30, 14, 102, 26, 6, 110, 114, 2, 66, 138, 70, 30, 38, 158, 82, 42, 174, 30, 182, 6, 194, 66, 10, 106, 14, 114, 230, 78, 30, 22, 42, 258, 66, 30, 34, 278, 282, 142, 42, 154, 78, 314, 318, 166 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(A077067(n)) = A077067(n).

LINKS

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

FORMULA

a(n) = A007947(A008864(n)).

EXAMPLE

a(25) = rad(prime(25)+1) = rad(97+1) = rad(2*7^2) = 14.

PROG

(PARI) a(n)=my(f=factor(prime(n)+1)[, 1]); prod(i=1, #f, f[i]) \\ Charles R Greathouse IV, Aug 21 2013

(Haskell)

a077066 = a007947 . a008864  -- Reinhard Zumkeller, Sep 04 2013

CROSSREFS

Cf. A077063.

Sequence in context: A129628 A245691 A071044 * A324890 A180240 A065228

Adjacent sequences:  A077063 A077064 A077065 * A077067 A077068 A077069

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Oct 23 2002

STATUS

approved

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Last modified January 24 01:05 EST 2020. Contains 331178 sequences. (Running on oeis4.)