0,3

Conjecture: sequence is finite.

Table of n, a(n) for n=0..9.

a(5) = 73 as 173,373,773 are all prime.

Cf. A075611. [From R. J. Mathar, Sep 11 2008]

Sequence in context: A078552 A091259 A342546 * A075611 A191485 A119572

Adjacent sequences: A088644 A088645 A088646 * A088648 A088649 A088650

base,nonn

Amarnath Murthy, Oct 29 2003

More terms from David Wasserman, Aug 17 2005

approved