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A116121
Numbers k such that k concatenated with k-5 gives the product of two numbers which differ by 2.
6
65, 6653, 9605, 218413, 283720, 996005, 58446925, 99960005, 6086712229, 7385370133, 8478948853, 9999600005, 120178240093, 161171620229, 358247912200, 426843573160, 893417179213, 999996000005, 23376713203604
OFFSET
1,1
COMMENTS
Duplicate of A115432. See proof at A115432. - Robert Israel, Sep 13 2023
EXAMPLE
9999600005//9999600000 = 9999800000 * 9999800002, where // denotes concatenation.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved