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 A339812 Number of prime divisors of (A019565(n) - 1), counted with multiplicity. 5
 0, 1, 1, 2, 2, 2, 1, 2, 1, 3, 1, 2, 2, 4, 2, 2, 2, 5, 2, 4, 1, 3, 2, 3, 3, 3, 1, 8, 1, 2, 1, 3, 2, 2, 2, 6, 2, 2, 1, 4, 1, 5, 2, 2, 3, 4, 1, 2, 3, 3, 1, 4, 1, 6, 1, 6, 3, 3, 2, 5, 1, 2, 1, 4, 2, 3, 1, 4, 2, 2, 1, 2, 2, 3, 2, 5, 2, 4, 2, 3, 1, 6, 2, 2, 3, 3, 2, 4, 1, 3, 1, 5, 2, 2, 2, 4, 4, 2, 3, 6, 2, 2, 2, 2, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 LINKS Antti Karttunen, Table of n, a(n) for n = 1..65537 FORMULA a(n) = A001222(A339809(n)) = A001222(A019565(n)-1). a(n) = A001222(A339810(n)). PROG (PARI) A019565(n) = { my(m=1, p=1); while(n>0, p = nextprime(1+p); if(n%2, m *= p); n >>= 1); (m); }; A339812(n) = bigomega(A019565(n)-1); CROSSREFS Cf. A001222, A019565, A339809, A339810. Sequence in context: A022307 A029413 A237523 * A238568 A238421 A105154 Adjacent sequences:  A339809 A339810 A339811 * A339813 A339814 A339815 KEYWORD nonn AUTHOR Antti Karttunen, Dec 18 2020 STATUS approved

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Last modified June 15 08:52 EDT 2021. Contains 345048 sequences. (Running on oeis4.)