OFFSET
1,1
LINKS
Indranil Ghosh, Table of n, a(n) for n = 1..2337
Eric Weisstein's World of Mathematics, Greatest Prime Factor
EXAMPLE
18 is in the sequence because 18 is a nonpalindromic number, 18 = 2*3^2, 81 = 3^4 and gpf(18) = gpf(81) = 3.
MATHEMATICA
Select[Range[2000], FactorInteger[#][[-1, 1]] == FactorInteger[FromDigits[Reverse[IntegerDigits[#]]]][[-1, 1]] && !PalindromeQ[#] & ]
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Ilya Gutkovskiy, Dec 06 2016
STATUS
approved