12 Days of Christmas
366
99 Bottles of Beer
325
Abundant Numbers
595
Catalan Numbers
840
Christmas Trees
617
Collatz
642
Divisors
844
Emirp Numbers
443
Evil Numbers
654
Fibonacci
674573753
960935
Fizz Buzz
578307
765692
Leap Years
528
628780784
Niven Numbers
626
Odious Numbers
676
Ordinal Numbers
402
Pascal’s Triangle
659
Pernicious Numbers
602
Prime Numbers
769
Quine
594
Sierpiński Triangle
557
φ
602
√2
704
𝑒
699