12 Days of Christmas
415
99 Bottles of Beer
422
Abundant Numbers
724
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Christmas Trees
688
Diamonds
489
Divisors
792
Emirp Numbers
377
Evil Numbers
505
Fibonacci
701
Fizz Buzz
986
Happy Numbers
366
Leap Years
574
Niven Numbers
736
Odious Numbers
532
Pangram Grep
Pascal’s Triangle
350
Pernicious Numbers
413
Prime Numbers
554
Roman to Arabic
399
Seven Segment
405
Sierpiński Triangle
225
Spelling Numbers
λ
111
π
85
τ
59
φ
47
√2
49
𝑒
47