99 Bottles of Beer
449th
Abundant Numbers
236th
Arabic to Roman
345th
Christmas Trees
80th
Diamonds
66th
Divisors
363rd
Emirp Numbers
196th
Evil Numbers
241st
Fibonacci
154th
Fizz Buzz
52nd
Happy Numbers
205th
Leap Years
12th
12th
12th
Look and Say
205th
Niven Numbers
272nd
Odious Numbers
134th
Ordinal Numbers
165th
Pangram Grep
45th
Pascal’s Triangle
108th
Pernicious Numbers
190th
Prime Numbers
415th
Quine
70th240th
118th
279th
56th166th123rd
Recamán
246th
Roman to Arabic
298th
Seven Segment
232nd
Tongue-twisters
331st
π
103rd
φ
119th
√2
9th
17th12th
33rd
7th33rd15th38th1st
12th7th13th