A116229 - OEIS

%I #12 Jul 18 2021 02:49:18

%S 8,98,998,9998,99998,999998,9999998,99999998,999999998,9999999998,

%T 36363636361,45454545452,54545454543,63636363634,72727272725,

%U 81818181816,90909090907,99999999998,999999999998,9999999999998

%N Numbers k such that k*(k+6) gives the concatenation of two numbers m and m-9.

%e 99999998 * 100000004 = 100000001//99999992, where // denotes concatenation.

%Y Cf. A099150, A116098, A116228, A116230, A116237.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006