1,3

Do[ If[ PrimeQ[2*10^n + 11], Print[n]], {n, 0, 4800}]

Cf. A081677.

Sequence in context: A098969 A088275 A014281 this_sequence A122534 A101135 A088220

Adjacent sequences: A086862 A086863 A086864 this_sequence A086866 A086867 A086868

hard,more,nonn

Carl R. White (cyrek(AT)cyreksoft.yorks.com), Aug 20 2003

Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 25 2003