Numbers k not ending in zero that are a substring of k*(k+1).

Terms

a(0) =9a(1) =99a(2) =146a(3) =999a(4) =3701a(5) =8881a(6) =9999a(7) =10512a(8) =13088a(9) =13271a(10) =13466a(11) =15625a(12) =49547a(13) =50502a(14) =60146a(15) =73398a(16) =85941a(17) =99999a(18) =155613a(19) =205062a(20) =513335a(21) =712539a(22) =999999a(23) =1005012a(24) =1060146a(25) =1334666a(26) =3990487a(27) =5005002a(28) =9999999a(29) =20050062