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A023513
a(n) = sum of distinct prime divisors of prime(n) + 1.
1
3, 2, 5, 2, 5, 9, 5, 7, 5, 10, 2, 21, 12, 13, 5, 5, 10, 33, 19, 5, 39, 7, 12, 10, 9, 22, 15, 5, 18, 24, 2, 16, 28, 14, 10, 21, 81, 43, 12, 34, 10, 22, 5, 99, 16, 7, 55, 9, 24, 30, 18, 10, 13, 12, 48, 16, 10, 19, 141, 52, 73, 12, 20, 18, 159, 58, 85, 15, 34, 14, 64, 10
OFFSET
1,1
COMMENTS
a(n) = A008472(A008864(n)). - Reinhard Zumkeller, Mar 12 2010
LINKS
MATHEMATICA
Array[Plus@@First/@FactorInteger[Prime[ # ]+1]&, 5! ] (* Vladimir Joseph Stephan Orlovsky, Feb 28 2010 *)
CROSSREFS
Sequence in context: A154421 A057034 A075410 * A069735 A358536 A274457
KEYWORD
nonn
STATUS
approved