12 Days of Christmas
642nd
Christmas Trees
323rd
Divisors
1st
Emirp Numbers
50th
Emirp Numbers (Long)
227th
Evil Numbers
1st
Evil Numbers (Long)
38th
Fibonacci
186th
Fizz Buzz
58th20th
Foo Fizz Buzz Bar
1st
Leap Years
370th
Niven Numbers
144th
Pascal’s Triangle
213th
Prime Numbers
753rd
Quine
72nd
Smith Numbers
161st
π
141st
τ
118th
√2
224th