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 A097444 Second occurrence where n# + p is prime for primes p = 3,5,... 1
 7, 13, 41, 227, 2339, 30059, 510551, 9699727, 223092917, 6469693319, 200560490213, 7420738134911, 304250263527317, 13082761331670097, 614889782588491519, 32589158477190044803, 1922760350154212639159 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 COMMENTS Care has to be taken to start with a large enough n to be sure terms are not missed. Here we used n=100. LINKS Table of n, a(n) for n=2..18. FORMULA n# is n primorial = product of primes 2*3*5*...*p<=n EXAMPLE 5# = 2*3*5 = 30. 30+7 = 37 first prime,30+11 = 41 second prime. PROG (PARI) primorp2(n) = { pr=1; for(x=1, n, f=1; pr*=prime(x); for(m=1, n, y=pr+prime(m); if(isprime(y), f=1; for(m=m+1, n, y=pr+prime(m); if(isprime(y), print1(y", "); f=0; break, f=1)); ); if(f==0, break) ) ) } CROSSREFS Sequence in context: A045464 A134854 A330671 * A241718 A259184 A259186 Adjacent sequences: A097441 A097442 A097443 * A097445 A097446 A097447 KEYWORD nonn AUTHOR Cino Hilliard, Aug 23 2004 STATUS approved

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Last modified June 5 01:39 EDT 2023. Contains 363130 sequences. (Running on oeis4.)