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

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

Offset: 1

Author

Amarnath Murthy, Aug 12 2005

Keywords

• base
• nonn

Examples

			11, 113, 11311, etc. are primes.
		

Crossrefs

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

Extensions

The next term is too large to include.

Corrected and extended by Joshua Zucker, Jan 11 2006