A116124 Numbers k such that k concatenated with k-5 gives the product of two numbers which differ by 5.

61, 65479, 84289, 106609, 225649, 275599, 453589, 1869505, 2272555, 2738291, 3221951, 1667833021, 2475062749, 2525062249, 3500010739, 9032526511, 9225507211, 1753016898055, 1860598847399, 3233666953849, 3379207972471

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			9225507211//9225507206 = 9604950394 * 9604950399, where // denotes concatenation.
		

Crossrefs

Cf. A116118, A054214, A116125, A116130, A116255.