OFFSET
1,1
COMMENTS
Primes with digits already in descending order (like 311 and 3221) are trivial cases and are therefore excluded.
EXAMPLE
a(1)=13 because a descending sort of 13's digits yields 31 which is also prime. a(100)=2411 because a descending sort of 2411's digits yields 4211 which is also prime.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Chuck Seggelin (barkeep(AT)plastereddragon.com), Jul 07 2003
STATUS
approved