OFFSET
1,1
COMMENTS
a(33) <= 1320196303 (gap of 39029760). a(34) <= 1359226063 (gap of 39029760). a(35) <= 1398255823 (gap of 39029760). - Donovan Johnson, Jun 03 2012
EXAMPLE
a(3)=14 since (4,9,14) [or (6,10,14)] is an arithmetic progression of 3 semiprimes ending in 14 and 14 is the smallest semiprime with this property.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jul 28 2004
EXTENSIONS
More terms from T. D. Noe and Ray Chandler, Jul 29 2004
a(18)-a(20) from Ray Chandler, Aug 01 2004
More terms from Hugo Pfoertner, Aug 27 2004
a(26)-a(30) from Hugo Pfoertner, Sep 07 2004
a(31)-a(32) from Donovan Johnson, Jun 03 2012
STATUS
approved