A110774 Copies of 1 and 3 alternately such that every partial concatenation is a prime.

11, 3, 11, 33, 1111111, 3333333333, 11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Example

11, 113, 11311, etc. are primes.

Crossrefs

Cf. A110775, A110776, A110777, A110778, A112534, A110780, A110781, A110782, A110783, A110788, A110789.

Sequence in context: A082769 A194706 A110435 * A261411 A067063 A075023

Adjacent sequences: A110771 A110772 A110773 * A110775 A110776 A110777

Keyword

base,nonn

Author

Amarnath Murthy, Aug 12 2005

Extensions

The next term is too large to include.

Corrected and extended by Joshua Zucker, Jan 11 2006

Status

approved