OFFSET
1,2
EXAMPLE
66 = 2*3*11 is the smallest palindrome with prime signature p*q*r;
252 = 2^2*3^2*7 is the smallest palindrome with prime signature p^2*q^2*r;
77 is not a member as 6 which is a member has the same prime signature p*q;
where p,q,r are primes.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Apr 29 2003
EXTENSIONS
Corrected and extended by David Wasserman, Nov 03 2004
STATUS
approved