Almost got it, but not quite!
Hi William, you are right. The sign should only be negative when n = 2. Thanks.
Check to see if a Sudoku Puzzle is Solved
Return the first and last characters of a character array
SET (the card game)
Easy Sequences 6: Coefficient sums of derivatives
Easy Sequences 30: Nearly Pythagorean Triangles
Easy Sequences 7: Easy as Composite Pi
Easy Sequences 10: Sum of Cumsums of Fibonacci Sequence
Easy Sequences 19: Length of Prime-sided Rectangle with Maximum Area
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