A162250 Values of the form prime(prime(i)) with a prime digital sum.

3, 5, 11, 41, 67, 83, 157, 179, 191, 241, 283, 331, 353, 401, 461, 599, 739, 773, 797, 919, 991, 1031, 1217, 1297, 1433, 1471, 1499, 1523, 1723, 1741, 1787, 2027, 2063, 2081, 2221, 2269, 2351, 2609, 2647, 2683, 2719, 2803, 3019, 3109, 3169, 3259, 3299

Offset

1,1

Links

Table of n, a(n) for n=1..47.

Formula

{A006450(i) : A007953(A006450(i)) in A000040}. [From R. J. Mathar, Aug 03 2009]

Example

Prime(prime(6)) = 41. 4+1=5, prime. So 41 is in the sequence.

Prog

(PARI) sodip(n) = {
local(s=0, a, x, y, j, p);
for(x=1, n, p=prime(prime(x)); a=eval(Vec(Str(p))); y=sum(j=1, length(a), a[j]); if(isprime(y), print1(p", ")); )
}

Crossrefs

Intersection of A006450 and A028834.

Sequence in context: A035345 A254401 A174915 * A055511 A236457 A105236

Adjacent sequences: A162247 A162248 A162249 * A162251 A162252 A162253

Keyword

nonn,base

Author

Cino Hilliard, Jun 28 2009

Extensions

Definition rephrased by R. J. Mathar, Sep 11 2009

Status

approved