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A115267 Primes of the form p*q*r-2, where p, q and r are distinct primes. 3
103, 163, 193, 229, 271, 283, 383, 397, 433, 463, 593, 607, 613, 643, 661, 739, 757, 859, 883, 967, 1013, 1021, 1063, 1093, 1103, 1129, 1171, 1237, 1279, 1307, 1433, 1453, 1489, 1493, 1531, 1543, 1549, 1579, 1597, 1613, 1657, 1693, 1741, 1747, 1831 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
{A007304(n)-2} INTERSECTION {A000040}. - Jonathan Vos Post, Mar 06 2006
EXAMPLE
103 = 3*5*7-2, 163 = 3*5*11-2 etc.
MATHEMATICA
Select[Prime[Range[400]], Length[FactorInteger[ #+2]]==Plus@@(Last/@FactorInteger[ #+2])==3&]
CROSSREFS
Cf. A115093 Primes of the form p*q-2, where p and q are distinct primes.
Sequence in context: A328822 A141962 A309412 * A107217 A142942 A142098
KEYWORD
nonn
AUTHOR
Zak Seidov, Mar 04 2006
STATUS
approved

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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)