login
A068836
Smallest prime containing all the digits of the concatenation of first n natural numbers.
0
11, 211, 1123, 2143, 112543, 1124653, 1234657, 112345687, 1123465789, 10123457689, 10123457689, 10123457689, 10123457689, 10123457689, 10123457689, 10123457689, 10123457689, 10123457689, 10123457689
OFFSET
1,1
COMMENTS
a(n)=10123457689 for n>=10.
EXAMPLE
a(3) = 1123 which is the smallest prime that contains digits 1,2 and 3. a(4) = 2143.
CROSSREFS
Sequence in context: A249974 A124991 A176009 * A069628 A069613 A075858
KEYWORD
nonn,less,base
AUTHOR
Amarnath Murthy, Mar 09 2002
EXTENSIONS
More terms from Sascha Kurz, Mar 27 2002
Edited by Charles R Greathouse IV, Apr 28 2010
STATUS
approved