Numbers k such that k*(k+4) is a palindrome.

Terms

a(0) =0a(1) =1a(2) =7a(3) =14a(4) =21a(5) =33a(6) =44a(7) =144a(8) =235a(9) =269a(10) =524a(11) =1123a(12) =1452a(13) =1582a(14) =5412a(15) =8338a(16) =8459a(17) =11063a(18) =11223a(19) =23255a(20) =73491a(21) =145544a(22) =262808a(23) =266737a(24) =281349a(25) =1659022a(26) =2705669a(27) =3504083a(28) =5040882a(29) =7395091