Lenny Conundrum - Round #489

While wandering the Lost Desert you come across small, but perfectly shaped step pyramid. As you examine it, you note that each block seems to be exactly one square foot in dimension. You climb all 7 tiers to stand on the single capstone and look down. Surrounding the capstone, you can see 8 blocks.


Assuming the pyramid is entirely solid, how many blocks were used to form the pyramid?


Answer as an integer only.



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