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 A168530 Numbers that are the product of two distinct primes and they are sum of 3 consecutive products of two distinct primes. 0
 39, 58, 69, 93, 123, 177, 185, 253, 278, 295, 417, 446, 478, 538, 566, 597, 614, 698, 749, 766, 794, 898, 917, 982, 998, 1042, 1059, 1149, 1159, 1286, 1351, 1393, 1441, 1546, 1623, 1639, 1649, 1658, 1718, 1766, 1799, 1822, 1939, 1966, 2045, 2078, 2126 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..47. EXAMPLE 10+14+15=39, 15+21+22=58,.. MATHEMATICA f[n_]:=Last/@FactorInteger[n]=={1, 1}; a=6; b=10; lst={}; Do[If[f[n], p=a+b+n; If[f[p], AppendTo[lst, p]]; a=b; b=n], {n, 13, 7!}]; lst CROSSREFS Cf. A006881, A168474, A168477 Sequence in context: A327586 A156333 A116281 * A253436 A253429 A338794 Adjacent sequences: A168527 A168528 A168529 * A168531 A168532 A168533 KEYWORD nonn AUTHOR Vladimir Joseph Stephan Orlovsky, Nov 28 2009 STATUS approved

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Last modified July 25 05:51 EDT 2024. Contains 374586 sequences. (Running on oeis4.)