12 Days of Christmas
266
99 Bottles of Beer
249
Abundant Numbers
685
Abundant Numbers (Long)
751
Catalan Numbers
520
Catalan’s Constant
59
Christmas Trees
513
Collatz
633
Diamonds
303
Divisors
837
Emirp Numbers
464
Emirp Numbers (Long)
520
Evil Numbers
754
Evil Numbers (Long)
738
Fibonacci
886
Fizz Buzz
570
Foo Fizz Buzz Bar
495
Leap Years
812
Niven Numbers
740
Niven Numbers (Long)
806
Odious Numbers
781
Odious Numbers (Long)
778
Ordinal Numbers
523
Pernicious Numbers
309
Prime Numbers
585
Prime Numbers (Long)
619
λ
97
π
56
τ
56
φ
50
√2
47
𝑒
46