

A095184


a(1) = 3; for n > 1 a(n) is the least prime of form a(n1) + k*prime(n1) with k > 0.


1



3, 5, 11, 31, 59, 103, 181, 283, 359, 727, 1249, 1373, 1447, 1693, 1951, 2609, 2927, 3163, 3407, 3541, 3967, 4259, 4733, 5231, 6121, 6703, 7309, 7927, 8783, 9001, 9227, 10243, 12601, 13697, 15643, 17431, 20149, 23603, 23929, 25933, 30431, 31147
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..42.


EXAMPLE

For n = 4 we have a(n1) = a(3) = 11, prime(n1) = prime(3) = 5; a(3) + k*prime(3) = 11 + k*5 gives 16 for k = 1, 21 for k = 2, 26 for k = 3 and prime 31 for k = 4, hence a(4) = 31.


PROG

(PARI) {for(n=1, 42, if(n==1, a=3, p=prime(n1); k=1; while(!isprime(r=a+k*p), k++); a=r); print1(a, ", "))}


CROSSREFS

Cf. A085041. [R. J. Mathar, Sep 04 2008]
Sequence in context: A165572 A246901 A236568 * A048235 A154939 A121926
Adjacent sequences: A095181 A095182 A095183 * A095185 A095186 A095187


KEYWORD

nonn,easy


AUTHOR

Amarnath Murthy, Jun 02 2004


EXTENSIONS

Edited and extended by Klaus Brockhaus, Jun 04 2004


STATUS

approved



