A116162 Numbers k such that k concatenated with itself gives the product of two numbers which differ by 9.
2, 92, 180, 332, 486, 536, 992, 9720, 9992, 13220, 40502, 99992, 941486, 999992, 2066120, 2975202, 9999992, 77854680, 99999992, 123250136, 162423540, 243964010, 256109750, 356387462, 421110162, 542936282, 547361900
Offset: 1