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

%I #6 Jul 20 2021 23:45:45

%S 6,96,150,186,324,376,666,996,2046,3000,9996,82650,99996,100384,

%T 466716,999996,1322316,4049584,9999996,67820074,99999996,110003884,

%U 135734074,156502836,196043286,213017754,238849000,261405396

%N Numbers k such that k concatenated with itself gives the product of two numbers which differ by 5.

%Y Cf. A116112, A116125, A116159, A116172, A116289.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006