12 Days of Christmas
804
99 Bottles of Beer
594
Abundant Numbers
724
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Christmas Trees
688
Diamonds
489
Divisors
791
Emirp Numbers
429
Evil Numbers
505
Fibonacci
701
Fizz Buzz
986
Happy Numbers
443
Leap Years
574
Niven Numbers
736
Odious Numbers
532
Pangram Grep
Pascal’s Triangle
350
Pernicious Numbers
412
Prime Numbers
554
Roman to Arabic
400
Seven Segment
454
Sierpiński Triangle
232
Spelling Numbers
λ
154
π
53
τ
59
φ
47
√2
49
𝑒
47