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A136012
Numbers n in any run of two or more numbers each having exactly two distinct prime divisors.
0
14, 15, 20, 21, 22, 33, 34, 35, 36, 38, 39, 40, 44, 45, 46, 50, 51, 52, 54, 55, 56, 57, 58, 62, 63, 68, 69, 74, 75, 76, 77, 85, 86, 87, 88, 91, 92, 93, 94, 95, 96, 98, 99, 100, 111, 112, 115, 116, 117, 118, 119, 122, 123, 124, 133, 134, 135, 136, 141, 142, 143, 144
OFFSET
1,1
EXAMPLE
a(3) to a(5), 20 to 22, are a run of 3 consecutive numbers each having exactly 2 distinct prime divisors.
CROSSREFS
Sequence in context: A114962 A278979 A220671 * A038456 A346549 A075658
KEYWORD
easy,nonn
AUTHOR
Enoch Haga, Dec 09 2007
EXTENSIONS
Corrected and edited by R. J. Mathar, Dec 12 2007
STATUS
approved