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 A112013 Primes p such that there exists at least one number j and pi(p)= d_1 d_2 ... d_j*d_(j+1) d_(j+2) ... d_k where d_1 d_2 ...d_k is the decimal expansion of p. 3
 17, 73, 619, 1117, 64591, 64601, 64661, 2077121, 5070613, 8883067, 2121104897, 4387047283, 14304478789, 503890508623, 1547037000637 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS This sequence is the prime subsequence of the sequence A112012. There is no further term up to prime(26000000). Contribution from David Wasserman, Mar 26 2009: (Start) In all terms after 64661, d_(j+1) = 0. No more terms < prime(822900000) (End) a(16) > 2*10^12. - Giovanni Resta, Feb 27 2013 LINKS EXAMPLE 8883067 is in the sequence because 8883067 is prime; pi(8883067)=595161 & 595161=8883*067. Note that for this term j=4. MATHEMATICA Do[If[MemberQ[h=IntegerDigits[Prime[m]]; k=Length[h]; Table[FromDigits[Table[h[[i]], {i, j}]]*FromDigits[Table[h[[i]], {i, j+1, k}]], {j, k}], m], Print[m]], {m, 26000000}] CROSSREFS Cf. A112012. Sequence in context: A201262 A146658 A145440 * A165691 A154419 A208399 Adjacent sequences:  A112010 A112011 A112012 * A112014 A112015 A112016 KEYWORD base,more,nonn AUTHOR Farideh Firoozbakht, Oct 09 2005 EXTENSIONS More terms from David Wasserman, Mar 26 2009 a(14)-a(15) from Giovanni Resta, Feb 27 2013 STATUS approved

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Last modified August 12 07:45 EDT 2022. Contains 356067 sequences. (Running on oeis4.)