99 Bottles of Beer
527th
Abundant Numbers
289th
Arabic to Roman
415th
Christmas Trees
107th
Diamonds
86th
Divisors
405th
Emirp Numbers
232nd
Evil Numbers
281st
Fibonacci
197th
Fizz Buzz
66th
Happy Numbers
237th
Leap Years
45th
12th
18th
Look and Say
253rd
Niven Numbers
319th
Odious Numbers
163rd
Ordinal Numbers
191st
Pangram Grep
65th
Pascal’s Triangle
135th
Pernicious Numbers
242nd
Prime Numbers
473rd
Quine
74th263rd
128th
301st
82nd178th132nd
Recamán
287th
Roman to Arabic
342nd
Seven Segment
268th
Tongue-twisters
389th
π
140th
φ
151st
√2
10th
18th10th
41st
8th39th17th43rd1st
15th9th14th