99 Bottles of Beer
501st
Abundant Numbers
267th
Arabic to Roman
391st
Christmas Trees
86th
Diamonds
73rd
Divisors
388th
Emirp Numbers
217th
Evil Numbers
263rd
Fibonacci
181st
Fizz Buzz
54th
Happy Numbers
221st
Leap Years
30th
12th
14th
Look and Say
228th
Niven Numbers
297th
Odious Numbers
149th
Ordinal Numbers
180th
Pangram Grep
54th
Pascal’s Triangle
121st
Pernicious Numbers
217th
Prime Numbers
449th
Quine
72nd257th
124th
293rd
70th186th130th
Recamán
268th
Roman to Arabic
327th
Seven Segment
250th
Tongue-twisters
368th
π
120th
φ
139th
√2
10th
18th12th
41st
7th37th17th38th1st
15th8th13th