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 A137627 Semiprimes (p+4) associated with first prime in A137625. 3
 6, 33, 177, 713, 1745, 8301, 8301, 19217, 175233, 175233, 33952613, 4377722627, 4377722627, 1242030992177, 1242030992177 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Some terms may overlap: e.g., k=9 and k=10 both begin with p=175229 where p+4 = 175233. LINKS Table of n, a(n) for n=1..15. FORMULA For each p, the semiprime is p+4. EXAMPLE a(2)=33 because if p=29, then p+4 is 33 and semiprime (3*11). CROSSREFS Cf. A001358, A137625, A137626, A137628. Sequence in context: A094165 A111994 A092851 * A138395 A050151 A009162 Adjacent sequences: A137624 A137625 A137626 * A137628 A137629 A137630 KEYWORD more,nonn AUTHOR Enoch Haga, Jan 30 2008 EXTENSIONS a(1) corrected by and a(11)-a(15) from Giovanni Resta, Jun 22 2018 STATUS approved

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Last modified July 16 08:10 EDT 2024. Contains 374345 sequences. (Running on oeis4.)