OFFSET
1,1
EXAMPLE
a(1) = 2357 because its leading digits are the 1-digit primes, viz. 2, 3, 5 and 7 and it is prime.
CROSSREFS
KEYWORD
base,nonn,bref
AUTHOR
Walter Nissen, Mar 10 2003
EXTENSIONS
The next term is too large to include.
STATUS
approved