Problem 189. Sum all integers from 1 to 2^n

Solution 1230049

Submitted on 12 Jul 2017 by Dustin Jones

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Test	Status	Code Input and Output
1	Pass	x = 3; y_correct = 36; assert(isequal(sum_int(x),y_correct))
2	Pass	x = 7; y_correct = 8256; assert(isequal(sum_int(x),y_correct))
3	Pass	x = 10; y_correct = 524800; assert(isequal(sum_int(x),y_correct))
4	Pass	x = 11; y_correct = 2098176; assert(isequal(sum_int(x),y_correct))
5	Pass	x = 14; y_correct = 134225920; assert(isequal(sum_int(x),y_correct))
6	Pass	x = 17; y_correct = 8590000128; assert(isequal(sum_int(x),y_correct))

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