OFFSET
1,1
COMMENTS
This sequence is very likely a permutation of the primes.
LINKS
Hans Havermann, Table of n, a(n) for n = 1..1500
Hans Havermann, Composition
EXAMPLE
Start with 2. The second term cannot be 3 because the concatenation of 2 and 3 is prime. However, 5 works. The third term cannot be 3 because the concatenation of 5 and 3 is prime. It cannot be 7 because the concatenation of 2 and 5 and 7 is prime. However, 11 works.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Hans Havermann, Apr 10 2013
STATUS
approved