12 Days of Christmas
805
99 Bottles of Beer
596
Abundant Numbers
724
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Christmas Trees
688
Diamonds
489
Divisors
791
Emirp Numbers
429
Evil Numbers
505
Fibonacci
701
Fizz Buzz
987
Happy Numbers
443
Leap Years
574
Niven Numbers
736
Odious Numbers
532
Pangram Grep
Pascal’s Triangle
349
Pernicious Numbers
412
Prime Numbers
554
Roman to Arabic
400
Seven Segment
462
Sierpiński Triangle
233
Spelling Numbers
λ
155
π
53
τ
59
φ
47
√2
49
𝑒
47