12 Days of Christmas
425
99 Bottles of Beer
425
Abundant Numbers
729
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Christmas Trees
692
Diamonds
492
Divisors
799
Emirp Numbers
380
Evil Numbers
506
Fibonacci
704
Fizz Buzz
989
Happy Numbers
369
Leap Years
590
Niven Numbers
743
Odious Numbers
535
Pangram Grep
Pascal’s Triangle
352
Pernicious Numbers
416
Prime Numbers
555
Roman to Arabic
402
Seven Segment
412
Sierpiński Triangle
229
Spelling Numbers
λ
122
π
85
τ
59
φ
47
√2
49
𝑒
48