A116101 Numbers k such that k concatenated with k-8 gives the product of two numbers which differ by 1.

40, 54999166056446260156057520, 57975463942945155043148110, 71745828111009107426351428, 75139610610667830220414750, 1640418113875534941913761115401064

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Examples

			40//32 = 63 * 64, where // denotes concatenation.
		

Crossrefs

Cf. A116094, A116102, A116115, A116232.