8 increased by a number x

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?

Someone me! if you’re smart you can solve this!