What is the sum of the following sequence:
Σk⋅k! for k=1...n
for different n?
Additional test cases have been added.
Duplicate each element of a vector.
Create a Multiplication table matrix...
What number has this problem?
Create sequnce 1 4 9 16 25.........
Sum of series III
Sum of series VII
Sum of series IV
Sum of series V
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