12 Days of Christmas
647th
Christmas Trees
324th
Divisors
1st
Emirp Numbers
50th
Emirp Numbers (Long)
229th
Evil Numbers
1st
Evil Numbers (Long)
38th
Fibonacci
187th
Fizz Buzz
58th20th
Foo Fizz Buzz Bar
1st
Leap Years
370th
Niven Numbers
147th
Pascal’s Triangle
213th
Prime Numbers
756th
Quine
72nd
Smith Numbers
161st
π
142nd
τ
118th
√2
225th