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 A079085 Number of distinct prime factors of (prime(n)+1)*(prime(n+1)+1)/4. 6
 1, 2, 2, 2, 3, 2, 3, 3, 3, 3, 2, 3, 4, 3, 2, 3, 4, 3, 3, 3, 3, 4, 4, 3, 3, 4, 3, 4, 4, 3, 3, 4, 5, 4, 4, 3, 3, 4, 4, 4, 5, 4, 3, 3, 4, 3, 3, 4, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 4, 4, 4, 5, 4, 3, 4, 3, 4, 5, 4, 4, 4, 4, 5, 4, 4, 4, 3, 4, 5, 5, 3, 4, 5, 5, 4, 3, 4, 5, 4, 4, 4, 4, 4, 4, 5, 4, 4, 3, 3, 4, 4, 5, 6, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A001221(A079079(n)). MATHEMATICA Table[PrimeNu[(Prime[n] + 1)*(Prime[n + 1] + 1)/4], {n, 1, 50}] (* G. C. Greubel, Apr 25 2017 *) PROG (Haskell) a079085 = a001221 . a079079 -- Reinhard Zumkeller, Oct 08 2012 (PARI) for(n=1, 50, print1(omega((prime(n) + 1)*(prime(n + 1) + 1)/4), ", ")) \\ G. C. Greubel, Apr 25 2017 CROSSREFS Cf. A079086. Sequence in context: A266225 A248596 A076984 * A076869 A335925 A104307 Adjacent sequences: A079082 A079083 A079084 * A079086 A079087 A079088 KEYWORD nonn AUTHOR Reinhard Zumkeller, Dec 22 2002 STATUS approved

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Last modified September 17 18:03 EDT 2024. Contains 375990 sequences. (Running on oeis4.)