also 2 and 3 times It's 1 in because it doesn't matter what one die rolls as long as the five others match it. For this to happen twice in a row.
Reasoning would be really helpful. I think the odds are one in 6 ^ 6 someone else thinks it's one in 6 ^5. We both could be wrong for all I know.
Kent's reasoning was, with one die, the chances of rolling a 6 were 1/ 6 which is correct. He also believed if he were to roll two dice, his chances were double this.