Go to ths site and type in your sequence.
See what you get as an answer.
The On-Line Encyclopedia of Integer Sequences
Write an explicit expression for the n-th term of the sequence.
I know that it increases by two more than the last increase each time, ie a1-a0 = 3 and a2-a1=5 and a3-a2=7
I would prefer instruction rather than just the simple answer please