A116193 Numbers k such that k concatenated with k+5 gives the product of two numbers which differ by 5.

11, 45, 18281, 32769, 56891, 180689, 330539, 959481, 1850201, 3247409, 4940219, 2425563239, 2575561739, 6003563495, 7245212645, 7770160145, 4983798265289, 5049762270381, 5534298528989, 5603798594169, 21894082450101

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Comments

Also numbers k such that k concatenated with k+9 gives the product of two numbers which differ by 3. For proof that this is the same sequence compare A116133.

Also numbers k such that k concatenated with k-9 gives the product of two numbers which differ by 9.

Examples

			7770160145//7770160136 = 8814851183 * 8814851192, where // denotes concatenation.
		

Crossrefs

Cf. A116205, A116187, A116349.

Cf. A116179, A115430, A116194, A116200, A116324.

Cf. A116099, A116109, A116231.

Extensions

Edited by N. J. A. Sloane, Apr 12 2007