99 Bottles of Beer
468th
Abundant Numbers
275th
Arabic to Roman
350th
Christmas Trees
39th
Diamonds
43rd
Divisors
392nd
Emirp Numbers
146th
Evil Numbers
241st
Fibonacci
155th
Fizz Buzz
113th
Happy Numbers
228th
Leap Years
12th
12th
12th
Look and Say
214th
Niven Numbers
283rd
Odious Numbers
134th
Ordinal Numbers
185th
Pangram Grep
46th
Pascal’s Triangle
127th
Pernicious Numbers
167th
Prime Numbers
439th
Quine
70th240th
118th
279th
56th166th124th
Recamán
250th
Roman to Arabic
298th
Seven Segment
73rd
Tongue-twisters
88th
π
119th
φ
146th
√2
9th
17th12th
33rd
7th33rd16th39th1st
13th7th13th