12 Days of Christmas
156
148
171
152
99 Bottles of Beer
17
15
Abundant Numbers
184
Christmas Trees
80
Divisors
545
Emirp Numbers
275
Evil Numbers
306
Fibonacci
134
Fizz Buzz
318
286
180
271
232
239Happy Numbers
336
Leap Years
307
36
Odious Numbers
295
Pascal’s Triangle
32
Pernicious Numbers
220
Prime Numbers
266
Quine
889
Rock-paper-scissors-Spock-lizard
272
Sierpiński Triangle
80
Smith Numbers
37
45
United States
88
Vampire Numbers
71
λ
172
π
227
45
τ
27
44
φ
96
26
√2
31
𝑒
31