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A116308 Numbers k such that k*(k+2) is the concatenation of two numbers m and m+3. 5

%I #7 Jul 17 2021 01:44:05

%S 452,547,690,855,4381,5618,72729,346532,653467,9090907,94117645,

%T 334665332,336032386,378253327,390977441,439928490,483516485,

%U 516483514,560071509,609022558,621746672,663967613,665334667

%N Numbers k such that k*(k+2) is the concatenation of two numbers m and m+3.

%Y Cf. A116177, A116295, A116307, A116309, A116315.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006

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Last modified July 12 10:18 EDT 2024. Contains 374244 sequences. (Running on oeis4.)