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 A137628 Semiprimes (p+4) associated with last prime in A137626. 3
 6, 35, 185, 737, 1781, 8367, 8373, 19277, 175337, 175353, 33952823, 4377722981, 4377723017, 1242030992721, 1242030992727 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..15. FORMULA For each p, the semiprime is p + 4. a(n) = A137626(n) + 4. - Sean A. Irvine, Feb 13 2012 EXAMPLE a(2)=35 because when p=29 (resp. 31), p+4=33 (resp. 35) and are semiprime (3*3 resp. 5*7). CROSSREFS Cf. A001358, A137625, A137626, A137627. Sequence in context: A014337 A002041 A103995 * A254826 A274373 A328331 Adjacent sequences: A137625 A137626 A137627 * A137629 A137630 A137631 KEYWORD more,nonn AUTHOR Enoch Haga, Jan 30 2008 EXTENSIONS a(11) from Sean A. Irvine, Feb 12 2012 a(1) corrected for consistency with change in A137626 by Sean A. Irvine, Jun 21 2018 a(12)-a(15) from Giovanni Resta, Jun 22 2018 STATUS approved

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Last modified July 24 21:32 EDT 2024. Contains 374585 sequences. (Running on oeis4.)