Numbers k such that k*(k+2) gives the concatenation of two numbers m and m+8.

Terms

a(0) =464a(1) =535a(2) =717a(3) =821a(4) =3427a(5) =6572a(6) =90906a(7) =980201a(8) =3636360a(9) =6363639a(10) =41176467a(11) =58823532a(12) =413533837a(13) =426573429a(14) =428571425a(15) =432620008a(16) =567379991a(17) =571428574a(18) =573426570a(19) =586466162a(20) =686261110a(21) =725274728a(22) =727272724a(23) =731321307