A252016 a(1)=2, a(2)=23; thereafter a(n) is the smallest prime which begins with the concatenation a(n-2)a(n-1).

2, 23, 223, 2322337, 223232233717, 232233722323223371711, 223232233717232233722323223371711159, 232233722323223371711223232233717232233722323223371711159007

Offset

1,1

Comments

a(4) = 2322337 == 23, 223, 37

Links

Alois P. Heinz, Table of n, a(n) for n = 1..13

Crossrefs

Cf. A240563.

Sequence in context: A069614 A036937 A083808 * A037750 A037631 A026075

Adjacent sequences: A252013 A252014 A252015 * A252017 A252018 A252019

Keyword

nonn,base

Author

Giovanni Teofilatto, Dec 13 2014

Extensions

a(6)-a(8) from Alois P. Heinz, Jan 01 2015

Status

approved