A116277 n times n+8 gives the concatenation of two numbers m and m-2.
65, 738, 892, 755003, 789545, 3643102, 6356891, 9084164, 405460897734702722, 416974886220714236, 583025113779285757, 594539102265297271, 920312382883217574, 931826371369229088, 4330823773309769374
Offset: 1
Examples
9084164 * 9084172 = 8252210//8252208, where // denotes concatenation.