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A079090
Sum of distinct prime factors of (prime(n)+1)*(prime(n+1)+1)/4.
4
3, 5, 5, 5, 12, 10, 10, 10, 10, 10, 21, 29, 23, 16, 5, 10, 41, 50, 22, 42, 44, 17, 17, 15, 27, 35, 18, 21, 38, 24, 16, 39, 40, 17, 29, 100, 122, 53, 41, 39, 30, 25, 102, 111, 21, 60, 62, 31, 52, 44, 23, 21, 23, 55, 59, 21, 27, 158, 189, 123, 83, 23, 36, 175, 213, 141, 98, 47
OFFSET
1,1
COMMENTS
a(n)=A008472(A079079(n)).
LINKS
MATHEMATICA
Total[Transpose[FactorInteger[((#[[1]]+1)(#[[2]]+1))/4]][[1]]]&/@ Partition[Prime[Range[70]], 2, 1] (* Harvey P. Dale, Apr 24 2015 *)
PROG
(Haskell)
a079090 = a008472 . a079079 -- Reinhard Zumkeller, Oct 09 2012
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Dec 22 2002
STATUS
approved