Question: How do you continue this sequence: 1,6,12,15,21,36?
Hint: 9 is related somehow.
Answer 1: It is a wrong version of
A050067 = 1, 3, 3, 6, 12, 15, 21, 36, 72, 75, 81 ...
(false)
Answer 2: Not at all, that are the 6 numbers
selected today by the German lottery.