%I #10 Jul 19 2021 01:19:26

%S 493,607,629,757,17927,33247,93869,19467217,31223879,72757727,

%T 13454739732766891651472740499,40093333713615672956030023507,

%U 48089152118689474641229584727,66424317743191484432891678269

%N Numbers k such that k concatenated with k+7 gives the product of two numbers which differ by 5.

%e 72757727//72757734 = 85298138 * 85298143, where // denotes concatenation.

%Y Cf. A116167, A116114, A116200, A116173, A116208, A116180, A116338.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006