The nth term for 16 24 32 40 48?

We note the sequence goes up in steps of '8'

Hence '8n'.

Next for step #1 4#1 ; n = 1 ; 8(1) + c = 16

8 + c = 16

c = 8

Hence the nth terms is 8n + 8

Verifications

When n = 3 ; 8(3) + 8 = 24 + 8 = 32 ( which is true).