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A089553 Seventh occurrence where (p-q)/(q-7), 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 (list; graph; refs; listen; history; text; internal format)
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=(p-q)/(q-d); 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

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Last modified April 23 03:51 EDT 2021. Contains 343199 sequences. (Running on oeis4.)