OFFSET
0,1
LINKS
Hieronymus Fischer, Table of n, a(n) for n = 0..100
EXAMPLE
a(0) = 2, since 2 is the least number with zero nonprime substrings.
a(1) = 13, since 13 has 1 nonprime substring (=’1’).
a(2) = 11, since 11 is the least number with 2 nonprime substrings (= 2 times ‘1’).
a(3) = 103, since 103 is the least number with 3 nonprime substrings, these are ‘1’ and ‘10’ and ‘03’ (‘0’ is not a valid substring in version 2).
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Hieronymus Fischer, Aug 26 2012
STATUS
approved