A116354 n times n+8 gives the concatenation of two numbers m and m+9.
365, 628, 771, 859, 9043, 81820, 366328, 633665, 7272729, 35294109, 64705884, 336663328, 340080963, 377622379, 400178770, 454545456, 477101847, 522898146, 545454537, 599821223, 622377614, 659919030, 663336665
Offset: 1