A078311 Smallest prime factor of n*rad(n)+1, where rad=A007947 (squarefree kernel).

2, 5, 2, 3, 2, 37, 2, 17, 2, 101, 2, 73, 2, 197, 2, 3, 2, 109, 2, 3, 2, 5, 2, 5, 2, 677, 2, 3, 2, 17, 2, 5, 2, 13, 2, 7, 2, 5, 2, 401, 2, 5, 2, 3, 2, 29, 2, 17, 2, 3, 2, 3, 2, 5, 2, 5, 2, 5, 2, 1801, 2, 5, 2, 3, 2, 4357, 2, 3, 2, 13, 2, 433, 2, 5477, 2, 3, 2, 5, 2, 3, 2, 5, 2, 3529, 2, 13

Offset

1,1

Comments

a(n)=A020639(A078310(n)).

Links

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

Prog

(Haskell)
a078311 = a020639 . a078310  -- Reinhard Zumkeller, Jul 23 2013

Crossrefs

Cf. A078312.

Sequence in context: A102707 A134486 A088006 * A132743 A192885 A246904

Adjacent sequences: A078308 A078309 A078310 * A078312 A078313 A078314

Keyword

nonn

Author

Reinhard Zumkeller, Nov 23 2002

Status

approved