A116302 - OEIS

A116302

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

%I #7 Jul 18 2021 02:55:19

%S 27,71,79822844,69852478553064869297984899963806,

%T 77473062193002372448027740546438,77747359197583788609974143907618,

%U 84341826458653210947638195982114,85367942837521291760016984490250

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

%e 79822844 * 79822847 = 63716866//63716868, where // denotes concatenation.

%Y Cf. A116171, A116296, A116301, A116303, A116309.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006