A116238 - OEIS

%I #9 Jul 18 2021 02:47:59

%S 69,79822842,69852478553064869297984899963804,

%T 77473062193002372448027740546436,77747359197583788609974143907616,

%U 84341826458653210947638195982112,85367942837521291760016984490248

%N Numbers k such that k*(k+7) gives the concatenation of two numbers m and m-8.

%e 79822842 * 79822849 = 63716866//63716858, where // denotes concatenation.

%Y Cf. A116107, A116230, A116237, A116239, A116243.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006