A116318 n times n+6 gives the concatenation of two numbers m and m+4.
32, 63, 45211540, 54788455, 78317867, 72388446037855609175404257, 73247326752475247326752672, 75267524732673267524732472, 76126405447292905676080887, 42053270820132695893502981749303
Offset: 1
Examples
78317867 * 78317873 = 61336887//61336891, where // denotes concatenation.