The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #11 Jul 18 2021 06:47:23
%S 8446,8811,69125298546226023972,69855225553525294045,
%T 74604750601020544520,75334677608319814593,92496418993920707747,
%U 93226346001219977820,97975871048715228295,98705798056014498368
%N Numbers k such that k*(k+5) gives the concatenation of two numbers m and m+9.
%e 8811 * 8816 = 7767//7776, where // denotes concatenation.
%Y Cf. A028557, A116180, A116338, A116350, A116352.
%K nonn,base
%O 1,1
%A _Giovanni Resta_, Feb 06 2006