12 Days of Christmas
270
99 Bottles of Beer
249
Abundant Numbers
688
Abundant Numbers (Long)
755
Catalan Numbers
522
Catalan’s Constant
59
Christmas Trees
516
Collatz
635
Diamonds
305
Divisors
858
Emirp Numbers
466
Emirp Numbers (Long)
523
Evil Numbers
755
Evil Numbers (Long)
740
Fibonacci
888
Fizz Buzz
572
Foo Fizz Buzz Bar
496
Leap Years
815
Niven Numbers
744
Niven Numbers (Long)
813
Odious Numbers
784
Odious Numbers (Long)
782
Ordinal Numbers
531
Pernicious Numbers
310
Prime Numbers
586
Prime Numbers (Long)
621
λ
100
π
56
τ
56
φ
50
√2
47
𝑒
46