%I #6 Jul 20 2021 23:45:39
%S 132,406,510,852,7930,66942,113322,440056,5289256,58477510,111333222,
%T 164378892,183673470,200444410,206611570,224376732,277008310,
%U 297520662,305024040,326530612,353505556,444000556,479289942
%N Numbers k such that k concatenated with itself gives the product of two numbers which differ by 1.
%Y Cf. A116141, A116136, A116163, A116285.
%K nonn,base
%O 1,1
%A _Giovanni Resta_, Feb 06 2006