What is the next term in series 1, 7, 16, 45, 79, 496, ?

Question

Find the number that comes next in the following series:

3, 7, 12, 14, 16, 19, 21, 25, 30, 41, 45, 52, 54, 56, 59, 61, 65, 70, ?

Answer 1

1 -> one (3 letters)
7 -> seven (5)
16 -> sixteen (7)
45 -> forty five (9)
79 -> seventy nine (11)
496 -> four ninety six (13)

So next number should have 15 letters i.e. 587 maybe

Ans: 587

Answer 2

(1+7)*2^1=16
(7+16)*2-1^1=45
(45+79)*2^2=496
then
(79+496)*2-1^2=1149
so  the next  no  is  1149