SOLUTION: What are the next three numbers in this series of numbers? 1,3,9,19,33,51,73

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Question 637072: What are the next three numbers in this series of numbers?
1,3,9,19,33,51,73
Answer by checkley79(3341) About Me  (Show Source):
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1,3,9,19,33,51,73, 99,129,163 ans.
2 6 10 14 18 22 26 30 34 difference
+4 +4 +4 +4 +4 +4 +4 +4 difference