A116348 - OEIS

%I #7 Jul 17 2021 01:44:59

%S 10,90,3678,6322,8788,48745,51255,87619,3762556,6237444,9217102,

%T 3266298276,3520463766,6479536234,6733701724,8063694650,8317860140,

%U 4689524709430934476,5310475290569065524,7416797436703661749

%N Numbers k such that k*(k+1) gives the concatenation of two numbers m and m+9.

%Y Cf. A116205, A116343, A116349.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006