12 Days of Christmas
272
99 Bottles of Beer
251
Abundant Numbers
700
Abundant Numbers (Long)
775
Catalan Numbers
537
Catalan’s Constant
61
Christmas Trees
524
Collatz
648
Diamonds
311
Divisors
871
Emirp Numbers
474
Emirp Numbers (Long)
538
Evil Numbers
769
Evil Numbers (Long)
759
Fibonacci
900
Fizz Buzz
576
Foo Fizz Buzz Bar
504
Leap Years
827
Niven Numbers
759
Niven Numbers (Long)
833
Odious Numbers
800
Odious Numbers (Long)
804
Ordinal Numbers
545
Pernicious Numbers
317
Prime Numbers
597
Prime Numbers (Long)
638
λ
102
π
57
τ
57
φ
51
√2
48
𝑒
47