A076566 - OEIS

A076566

Greatest prime divisor of 3n+3 (sum of three successive integers).

3, 3, 3, 5, 3, 7, 3, 3, 5, 11, 3, 13, 7, 5, 3, 17, 3, 19, 5, 7, 11, 23, 3, 5, 13, 3, 7, 29, 5, 31, 3, 11, 17, 7, 3, 37, 19, 13, 5, 41, 7, 43, 11, 5, 23, 47, 3, 7, 5, 17, 13, 53, 3, 11, 7, 19, 29, 59, 5, 61, 31, 7, 3, 13, 11, 67, 17, 23, 7, 71, 3, 73, 37, 5, 19, 11, 13, 79, 5, 3, 41, 83, 7

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OFFSET

1,1

COMMENTS

a(n) = A006530(A000082(n+1)). - Reinhard Zumkeller, Oct 03 2012

LINKS

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

MATHEMATICA

FactorInteger[Total[#]][[-1, 1]]&/@Partition[Range[100], 3, 1] (* Harvey P. Dale, Apr 03 2011 *)

PROG

(Haskell)

a076566 = a006530 . (* 3) . (+ 1) -- Reinhard Zumkeller, Oct 03 2012