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Products of exactly three supersingular primes (A002267).
2

%I #11 Feb 12 2013 18:10:43

%S 8,12,18,20,27,28,30,42,44,45,50,52,63,66,68,70,75,76,78,92,98,99,102,

%T 105,110,114,116,117,124,125,130,138,147,153,154,164,165,170,171,174,

%U 175,182,186,188,190,195,207,230,231,236,238,242,245,246,255,261

%N Products of exactly three supersingular primes (A002267).

%C The smallest "triprime" or "3-almost prime" not in this sequence is 148 = 2 * 2 * 37, as 37 is smallest prime which is not a supersingular prime.

%H T. D. Noe, <a href="/A212582/b212582.txt">Table of n, a(n) for n = 1..680</a> (complete sequence)

%F i * j * k such that i, j, k are each in A002267, not necessarily distinct.

%t Union[Times @@@ Tuples[{2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 41, 47, 59, 71}, 3]] (* _T. D. Noe_, May 21 2012 *)

%Y Cf. A002267, A014612, A108764 (products of exactly two supersingular primes), A212554 (products of supersingular primes).

%K nonn,easy,fini,full

%O 1,1

%A _Jonathan Vos Post_, May 21 2012