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1 solution
Notice how 3 0 0 0 × 3 0 0 0 + 1 2 0 0 4 = 3 0 0 0 2 + 1 2 0 0 0 + 4 Which is of the form n 2 + 4 n + 4 = ( n + 2 ) 2 = n + 2 where n = 3 0 0 0
3 0 0 0 + 2 = 3 0 0 2