final answer to challenge !
im sure your all bored with this now so the answer is as follows (you will hate me)
If you write the sequence out in letter form:
thirty, thirty two, thirty four, thirty six
firty, forty two, forty four, forty six
fifty, fifty two, fifty four, fifty six
sixty, sixty two, sixty four, sixty six
you will otice that following the rules of frequency as used in codes that the most commonly used letter in the english language is not present their and the only possible set of numbers that can come after them are 2000,2002,2004,2006
two thousand, two thousand and 2, two thousand and four, two thousand and six
as all other numbers would contain the letter E which normally appears 13% of the time apparently and is used on average as the every eight letter.