A073677 Rearrangement of the odd positive integers such that right concatenation of first 2m terms is prime, while a(2k+1) = 10k+5.

5, 3, 15, 21, 25, 17, 35, 9, 45, 27, 55, 129, 65, 249, 75, 93, 85, 77, 95, 551, 105, 219, 115, 203, 125, 127, 135, 119, 145, 113, 155, 209, 165, 83, 175, 57, 185, 163, 195, 221, 205, 149, 215, 91, 225, 483, 235, 81, 245, 177, 255, 61, 265, 307, 275

Offset

1,1

Links

Table of n, a(n) for n=1..55.

Example

53, 531521, 5315212517, 5315212517359, ... are all prime.

Crossrefs

Sequence in context: A213548 A246204 A185733 * A223535 A211943 A189237

Adjacent sequences: A073674 A073675 A073676 * A073678 A073679 A073680

Keyword

base,nonn

Author

Amarnath Murthy, Aug 11 2002

Extensions

More terms from Max Alekseyev, Dec 09 2011

Status

approved