A116121 Numbers k such that k concatenated with k-5 gives the product of two numbers which differ by 2.

65, 6653, 9605, 218413, 283720, 996005, 58446925, 99960005, 6086712229, 7385370133, 8478948853, 9999600005, 120178240093, 161171620229, 358247912200, 426843573160, 893417179213, 999996000005, 23376713203604

Offset: 1

Author

Giovanni Resta, Feb 06 2006

Keywords

• nonn
• base

Comments

Duplicate of A115432. See proof at A115432. - Robert Israel, Sep 13 2023

Examples

			9999600005//9999600000 = 9999800000 * 9999800002, where // denotes concatenation.
		

Crossrefs

Cf. A116116, A116120, A116122, A115431, A116252.