OK: so, I found that the hexagonal number for nth term is:
(Eventually, I will want to get to
Let P(n) be the statement .
(Base case) Since , which equals , P(1) is true.
Let k be a pos. integer.
Did i do something wrong? I have an extra +2 in the mix.
Please work with what I have, if possible, I kinda need to use the Strong Induction.