A068836 Smallest prime containing all the digits of the concatenation of first n natural numbers.

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.

Links

Table of n, a(n) for n=1..19.

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

Adjacent sequences: A068833 A068834 A068835 * A068837 A068838 A068839

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