A173968 Sums of 3 consecutive semiprimes.

102, 258, 282, 366, 426, 606, 642, 654, 906, 1182, 1338, 1902, 2094, 2526, 2766, 3126, 3414, 3786, 4038, 4206, 4926, 5286, 5514, 5682, 5826, 5946, 6306, 6546, 6654, 6918, 7086, 7302, 7386, 7554, 7926, 8166, 8202, 9294, 10158, 10806, 11082, 11598, 11706

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, Mar 03 2010

Keywords

• nonn

Comments

33 + 34 + 35 = 102,..

Crossrefs

Cf. A001358, A173966, A173967.

Programs

Mathematica

f[n_]:=Last/@FactorInteger[n]=={1,1}||Last/@FactorInteger[n]=={2};lst={};Do[If[f[n],If[f[n+1]&&f[n+2],AppendTo[lst,3*n+3]]],{n,8!}];lst