Triangular numbers can be calculated by using the following formula
(n * (n+1) ) / 2
so for 30 the answer is (30*31)/2 = 465
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Is 63 a triangular number I think it is a triangular number.
013
No, 18 is not a triangular number.
No, 35 is not a triangular number.
yes it is a triangular number