

A089553


Seventh occurrence where (pq)/(q7), p and q are primes.


0



47, 43, 53, 37, 113, 101, 29, 29, 173, 61, 89, 173, 43, 43, 137, 71, 59, 59, 29, 47, 71, 29, 53, 47, 59, 43, 53, 23
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OFFSET

7,1


LINKS

Table of n, a(n) for n=7..34.


PROG

(PARI) \ r is the occurrence desired 1=first, 2=second etc. \d is the amount we take from q diff2sqp2(n, r, d) = { forprime(q=d+1, n, c=0; forprime(p=q+1, n, y=(pq)/(qd); if(y==floor(y), if(isprime(y), c++; if(c==r, print1(y", "); break)) ) ) ) }


CROSSREFS

Sequence in context: A033367 A052352 A265673 * A165868 A291513 A249372
Adjacent sequences: A089550 A089551 A089552 * A089554 A089555 A089556


KEYWORD

easy,nonn


AUTHOR

Cino Hilliard, Dec 28 2003


STATUS

approved



