I need help figuring this out please! :)

Question

Write an equation for this sequence and find the 15th term.

Term Number 1 2 3 4
Term 0 1 2 3

Answer 1

if the term number can be represented by T and the term by t

then...

T = t + 1

so to find the 15th ter

15 = t +1

t = 14 <--- ANSWER!!!

Answer 2

ok can you help me with this one?!?!?!?

write an equation for this sequence and find the 100th term

term number 1 2 3 4
term 6 10 14 18

Answer 3

i think -43046721 is ans