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 A109066 Number of prime digits in n-th prime. 10
 1, 1, 1, 1, 0, 1, 1, 0, 2, 1, 1, 2, 0, 1, 1, 2, 1, 0, 1, 1, 2, 1, 1, 0, 1, 0, 1, 1, 0, 1, 2, 1, 2, 1, 0, 1, 2, 1, 1, 2, 1, 0, 0, 1, 1, 0, 1, 3, 3, 2, 3, 2, 1, 2, 3, 2, 1, 2, 3, 1, 2, 2, 2, 1, 2, 2, 2, 3, 2, 1, 3, 2, 2, 3, 2, 2, 1, 2, 0, 0, 0, 1, 1, 2, 1, 1, 0, 2, 0, 1, 1, 1, 1, 0, 0, 2, 1, 2, 3, 1, 2, 3, 2, 1, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,9 COMMENTS The prime A000040(n) is in A034844 iff a(n) = 0; it is in A179336 iff a(n) > 0. [Reinhard Zumkeller, Jul 11 2010, corrected by M. F. Hasler, Aug 27 2012] LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A193238(A000040(n)). [Reinhard Zumkeller, Jul 19 2011] MATHEMATICA a[n_]:=Count[PrimeQ/@IntegerDigits[Prime[n]], True] PROG (PARI) a(n) = vecsum(apply(x->isprime(x), digits(prime(n)))); \\ Michel Marcus, Mar 15 2019 CROSSREFS Cf. A019546 (primes whose digits are primes), A092629 (number of prime digits is nonprime), A104250 (sum of prime digits of n-th prime). Cf. A000040, A034844, A179336. Sequence in context: A137412 A025925 A240857 * A079066 A157188 A329257 Adjacent sequences:  A109063 A109064 A109065 * A109067 A109068 A109069 KEYWORD base,nonn AUTHOR Zak Seidov, Jun 17 2005 STATUS approved

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Last modified December 12 12:30 EST 2019. Contains 329958 sequences. (Running on oeis4.)