A212582 - OEIS

A212582

Products of exactly three supersingular primes (A002267).

8, 12, 18, 20, 27, 28, 30, 42, 44, 45, 50, 52, 63, 66, 68, 70, 75, 76, 78, 92, 98, 99, 102, 105, 110, 114, 116, 117, 124, 125, 130, 138, 147, 153, 154, 164, 165, 170, 171, 174, 175, 182, 186, 188, 190, 195, 207, 230, 231, 236, 238, 242, 245, 246, 255, 261

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OFFSET

1,1

COMMENTS

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.

LINKS

T. D. Noe, Table of n, a(n) for n = 1..680 (complete sequence)

FORMULA

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

MATHEMATICA

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 *)

CROSSREFS