Numbers k such that k*(k+2) is a palindrome.

Terms

a(0) =0a(1) =1a(2) =2a(3) =9a(4) =17a(5) =23a(6) =64a(7) =75a(8) =99a(9) =191a(10) =204a(11) =999a(12) =1747a(13) =1907a(14) =2365a(15) =2966a(16) =5731a(17) =9999a(18) =18991a(19) =20564a(20) =99999a(21) =174601a(22) =174747a(23) =179317a(24) =243063a(25) =293786a(26) =552101a(27) =999999a(28) =1868287a(29) =2967032