12 Days of Christmas
149
66114
66
99 Bottles of Beer
16
8
Abundant Numbers
167
Christmas Trees
70
Divisors
519
Emirp Numbers
262
Evil Numbers
270
Fibonacci
114
Fizz Buzz
224285158270
219215
Happy Numbers
277
Leap Years
307
30
Odious Numbers
260
Pascal’s Triangle
28
Pernicious Numbers
195
Prime Numbers
242
Quine
891
Rock-paper-scissors-Spock-lizard
189
Sierpiński Triangle
89
Smith Numbers
35
32
United States
67
Vampire Numbers
71
λ
86
π
209
38
τ
27
38
φ
95
24
√2
28
𝑒
28