12 Days of Christmas
366
99 Bottles of Beer
325
Abundant Numbers
595
Catalan Numbers
841
Christmas Trees
618
Collatz
643
Divisors
844
Emirp Numbers
443
Evil Numbers
655
Fibonacci
675574753
961935
Fizz Buzz
579307
766692
Leap Years
528
576781785
Niven Numbers
626
Odious Numbers
676
Ordinal Numbers
396
Pascal’s Triangle
660
Pernicious Numbers
602
Prime Numbers
770
Quine
594
Sierpiński Triangle
558
φ
602
√2
705
𝑒
700