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Harvey P. Dale, Table of n, a(n) for n = 0..1000
Eric Weisstein's World of Mathematics, Prime Triplet.
Select[Range[1, 1601, 2], PrimeOmega[#]==4&] (* Harvey P. Dale, Aug 15 2014 *)
Sequence in context: A119943 A001245 A186463 * A046374 A153259 A207050
Adjacent sequences: A046314 A046315 A046316 * A046318 A046319 A046320
Patrick De Geest, Jun 15 1998.