12 Days of Christmas
156
148171
152
99 Bottles of Beer
17
15
Abundant Numbers
184
Christmas Trees
81
Divisors
546
Emirp Numbers
274
Evil Numbers
306
Fibonacci
134
Fizz Buzz
318286180272
232240
Happy Numbers
336
Leap Years
307
36
Odious Numbers
295
Pascal’s Triangle
32
Pernicious Numbers
221
Prime Numbers
266
Quine
890
Rock-paper-scissors-Spock-lizard
269
Sierpiński Triangle
80
Smith Numbers
37
45
United States
88
Vampire Numbers
71
λ
172
π
228
45
τ
27
45
φ
95
26
√2
31
𝑒
31