12 Days of Christmas
80
99 Bottles of Beer
294
10
Abundant Numbers
280
Christmas Trees
97
Diamonds
50
Divisors
394
Emirp Numbers
372
Evil Numbers
500
Fibonacci
336
Fizz Buzz
288
366
Happy Numbers
403
Leap Years
377
Niven Numbers
333
Odious Numbers
500
Ordinal Numbers
Pascal’s Triangle
64
Pernicious Numbers
245
175
357
Prime Numbers
333320
Quine
1,0004405004268546308934921,000482477783969436893
Sierpiński Triangle
134
λ
248
129
216
16722110289
π
84
59
110
25785739
τ
88
61
110
27785740
φ
58
49
109
31775125
√2
55
51
112
27954829
𝑒
59
49
89
26654729