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Numbers k such that k concatenated with k-8 gives the product of two numbers which differ by 3.
4

%I #6 Jul 21 2021 22:46:18

%S 58,1552909498221642960203840517299022287877411846,

%T 1723404686015903064905313664707396376746205762,

%U 2153694542826970975147295558223788704098018912

%N Numbers k such that k concatenated with k-8 gives the product of two numbers which differ by 3.

%e 58//50 = 75 * 78, where // denotes concatenation.

%Y Cf. A116102, A116104, A116110, A116234.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006