99 Bottles of Beer
606
Abundant Numbers
684
Christmas Trees
399
Diamonds
388
Divisors
930
Emirp Numbers
445
Evil Numbers
726
Fibonacci
908
Fizz Buzz
645
Happy Numbers
570
Leap Years
587
Niven Numbers
524
Odious Numbers
751
Pascal’s Triangle
590
Pernicious Numbers
638
Prime Numbers
484
λ
146
π
63
τ
62
φ
51
√2
47
𝑒
46