A116258 - OEIS

%I #9 Jul 18 2021 02:52:57

%S 8444,8809,69125298546226023970,69855225553525294043,

%T 74604750601020544518,75334677608319814591,92496418993920707745,

%U 93226346001219977818,97975871048715228293,98705798056014498366

%N Numbers k such that k*(k+9) gives the concatenation of two numbers m and m-5.

%e 8809 * 8818 = 7767//7762, where // denotes concatenation.

%Y Cf. A116180, A116245, A116257, A116264.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006