OFFSET
1,2
COMMENTS
Conjecture: sequence is finite.
No more terms < 166890000. - David Wasserman, Apr 19 2005
EXAMPLE
a(4) = 23 as 1*2*6+1, 2*6*23+1, 1*6*23+1 and 1*2*23+1 (i.e. 13, 277, 139 and 47) all are primes.
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Aug 29 2003
EXTENSIONS
Corrected and extended by David Wasserman, Apr 19 2005
STATUS
approved