A116303 n times n+5 gives the concatenation of two numbers m and m+2.
3, 84, 76981, 714688, 952312, 90438189, 96320542, 32980078899027, 34346653774236, 42816188292271, 42881990066486, 57118009933510, 57183811707725, 65653346225760, 67019921100969, 81321742742208
Offset: 1
Examples
96320542 * 96320547 = 92776472//92776474, where // denotes concatenation.