are redwood trees the same as Sequoia?

Coast redwoods' scientific name is Sequoia sempervirens. So called because they are able to propagate themselves after being cut down. Giant Sequoias such as those found in Tulare County are called Sequoiadendron giganteum. Both are members of what was once a highly diverse and widespread genus of which only three species are known to live today. The third is Metasequoia glyptostroboides commonly called the dawn redwood. At the parking area to the south of the park, you can find a row of dawn redwoods.

Sequoia are giant redwoods.

I'm sure sequoia is a type of red wood tree

I believe the Redwood Tree is classified as a Giant Sequoia, or Sequoia Semper Virens... possibly implying crazy big :)

Yes a Sequoia is a redwood tree