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A116194
Numbers k such that k concatenated with k+5 gives the product of two numbers which differ by 6.
5
1, 2, 10, 47, 550, 802, 570035, 623387, 1327222, 4041011, 8252210, 164398539591831062, 173868055738777586, 339918283297349107, 353476744122425611, 846974882088186070, 868300386379144450
OFFSET
1,2
EXAMPLE
8252210//8252215 = 9084165 * 9084171, where // denotes
concatenation.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, Feb 06 2006
STATUS
approved