Cody

# Problem 21. Return the 3n+1 sequence for n

Solution 105915

Submitted on 3 Jul 2012 by davide
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### Test Suite

Test Status Code Input and Output
1   Pass
%% n = 1; c_correct = 1; assert(isequal(collatz(n),c_correct))

2   Pass
%% n = 2; c_correct = [2 1]; assert(isequal(collatz(n),c_correct))

n = 1 c = 2 1 i = 3

3   Pass
%% n = 5; c_correct = [5 16 8 4 2 1]; assert(isequal(collatz(n),c_correct))

n = 16 c = 5 16 i = 3 n = 8 c = 5 16 8 i = 4 n = 4 c = 5 16 8 4 i = 5 n = 2 c = 5 16 8 4 2 i = 6 n = 1 c = 5 16 8 4 2 1 i = 7

4   Pass
%% n = 22; c_correct = [22 11 34 17 52 26 13 40 20 10 5 16 8 4 2 1]; assert(isequal(collatz(n),c_correct))

n = 11 c = 22 11 i = 3 n = 34 c = 22 11 34 i = 4 n = 17 c = 22 11 34 17 i = 5 n = 52 c = 22 11 34 17 52 i = 6 n = 26 c = 22 11 34 17 52 26 i = 7 n = 13 c = 22 11 34 17 52 26 13 i = 8 n = 40 c = 22 11 34 17 52 26 13 40 i = 9 n = 20 c = 22 11 34 17 52 26 13 40 20 i = 10 n = 10 c = 22 11 34 17 52 26 13 40 20 10 i = 11 n = 5 c = Columns 1 through 10 22 11 34 17 52 26 13 40 20 10 Column 11 5 i = 12 n = 16 c = Columns 1 through 10 22 11 34 17 52 26 13 40 20 10 Columns 11 through 12 5 16 i = 13 n = 8 c = Columns 1 through 10 22 11 34 17 52 26 13 40 20 10 Columns 11 through 13 5 16 8 i = 14 n = 4 c = Columns 1 through 10 22 11 34 17 52 26 13 40 20 10 Columns 11 through 14 5 16 8 4 i = 15 n = 2 c = Columns 1 through 10 22 11 34 17 52 26 13 40 20 10 Columns 11 through 15 5 16 8 4 2 i = 16 n = 1 c = Columns 1 through 10 22 11 34 17 52 26 13 40 20 10 Columns 11 through 16 5 16 8 4 2 1 i = 17