OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..83 (* All terms less than 1 million *)
EXAMPLE
6903=T(117) and 6903=9*767.
MATHEMATICA
Module[{upto=120000, pals}, pals=Select[Range[2, upto/2], PalindromeQ]; Select[ Times@@@Tuples[pals, 2], OddQ[Sqrt[8#+1]]&&#<=upto&]]//Union (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 13 2018 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Jan 31 2006
STATUS
approved