A116107 - OEIS

%I #8 Jul 21 2021 22:46:45

%S 52,63716866,48793687600063875363014809897052,

%T 60020753655608135708762056127156,60446518621981165303188950156776,

%U 71135436903815748345367595855336,72876856643103028189103298533248

%N Numbers k such that k concatenated with k-8 gives the product of two numbers which differ by 7.

%C Also numbers n such that n concatenated with n-2 gives the product of two numbers which differ by 5.

%e 63716866//63716864 = 79822843 * 79822848, where // denotes concatenation.

%Y Cf. A116099, A116106, A115429, A116112, A116238, A115426, A116146, A116276.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006

%E Edited by _N. J. A. Sloane_, Apr 15 2007