A116243 n times n+7 gives the concatenation of two numbers m and m-7.

38, 56, 32262230, 67737764, 79321054, 3341093417798787499091, 3861488851737861033959, 4747922651210186579785, 5252077348789813420209, 6138511148262138966035, 6658906582201212500903, 7232275368591793618229

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			79321054 * 79321061 = 62918301//62918294, where // denotes
concatenation.
		

Crossrefs

Cf. A116112, A116238, A116242, A116244, A116250.