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A116317 Numbers k such that k*(k+4) gives the concatenation of two numbers m and m+4. 5

%I

%S 7745,8019,33294316,66705681,98000199,340465755423,476452552743,

%T 523547447254,659534244574,866013200679,998000001999,3695104677080132,

%U 3755782995538766,4198081170077529,4803478892324964,5196521107675033

%N Numbers k such that k*(k+4) gives the concatenation of two numbers m and m+4.

%e 98000199 * 98000203 = 96040393//96040397, where // denotes concatenation.

%Y Cf. A115429, A116297, A116316, A116318, A116323.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006

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Last modified September 22 02:48 EDT 2021. Contains 347605 sequences. (Running on oeis4.)