OFFSET
1,1
LINKS
EXAMPLE
15 is a term since 15 = 3*5 and 51 = 3*17, and both are of the form p*q where p and q are primes.
MATHEMATICA
sig[n_] := Sort @ FactorInteger[n][[;; , 2]]; Select[Range[300], !PalindromeQ[#] && sig[#] == sig[IntegerReverse[#]] &] (* Amiram Eldar, Dec 30 2020 *)
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Amarnath Murthy, Mar 20 2002
EXTENSIONS
More terms from David Wasserman, Apr 19 2005
Offset corrected by Amiram Eldar, Dec 30 2020
STATUS
approved