99 Bottles of Beer
472nd
Abundant Numbers
247th
Arabic to Roman
374th
Christmas Trees
83rd
Diamonds
69th
Divisors
374th
Emirp Numbers
206th
Evil Numbers
252nd
Fibonacci
161st
Fizz Buzz
54th
Happy Numbers
214th
Leap Years
12th
12th
13th
Look and Say
215th
Niven Numbers
285th
Odious Numbers
137th
Ordinal Numbers
173rd
Pangram Grep
51st
Pascal’s Triangle
116th
Pernicious Numbers
201st
Prime Numbers
429th
Quine
71st248th
120th
287th
63rd171st127th
Recamán
258th
Roman to Arabic
314th
Seven Segment
240th
Tongue-twisters
349th
π
111th
φ
128th
√2
10th
17th12th
33rd
7th34th17th38th1st
14th7th13th