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 A226754 Numbers of the form p*q, p and q prime with q=2*p+3. 2
 14, 65, 119, 377, 629, 779, 1769, 3827, 4559, 5777, 9179, 10877, 16109, 19109, 25877, 32639, 37949, 39059, 49769, 56279, 60377, 75077, 78209, 79799, 100127, 103739, 105569, 145529, 154289, 161027, 189419, 228149, 244649, 250277, 288419, 294527, 316409, 335789 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Charles R Greathouse IV, Table of n, a(n) for n = 1..10000 MATHEMATICA fa = FactorInteger; t[n_]:=Length[fa[n]] == 2 && fa[n][[1, 2]]== fa[n][[2, 2]] == 1 && 2 fa[n][[1, 1]]+3 == fa[n][[2, 1]]; Select[1+Range[200000], t] Times@@#&/@Select[Table[{p, 2p+3}, {p, Prime[Range[200]]}], PrimeQ[#[[2]]]&] (* Harvey P. Dale, Jul 03 2021 *) PROG (PARI) list(lim)=my(v=List(), q); forprime(p=2, (sqrt(8*lim+9)-3)\4, if(isprime(q=2*p+3), listput(v, p*q))); Vec(v) \\ Charles R Greathouse IV, Nov 19 2013 CROSSREFS Cf. A129521, A156592, A226755. Sequence in context: A126401 A275268 A304873 * A058092 A213757 A249290 Adjacent sequences: A226751 A226752 A226753 * A226755 A226756 A226757 KEYWORD nonn AUTHOR José María Grau Ribas, Jun 16 2013 STATUS approved

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Last modified September 12 04:22 EDT 2024. Contains 375842 sequences. (Running on oeis4.)