1,1

Sequence is full since appending 0, 4, 6, 8, or 5 will lead to an obvious composite and 311931, 311933, 311937, 311939 are also composite. These are the first 5 entries of A048550. - Michel Marcus, Jun 30 2013

Table of n, a(n) for n=1..5.

a(1)=3

a(2)=31

a(3)=311

a(4)=3119

a(5)=31193

Sequence in context: A037778 A037666 A065837 * A065533 A048550 A236527

Adjacent sequences: A100891 A100892 A100893 * A100895 A100896 A100897

nonn,fini,full,base

Jorge Coveiro, Jan 10 2005

approved