1,1

Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

9 is a member as 919 and 191 are both prime.

Cf. A090263, A090264, A090265.

Sequence in context: A018466 A171152 A035107 * A190815 A006459 A049778

Adjacent sequences: A090259 A090260 A090261 * A090263 A090264 A090265

base,nonn

Amarnath Murthy, Nov 28 2003

More terms from mohammed bouayoun (bouyao(AT)wanadoo.fr), Feb 02 2004

approved