12 Days of Christmas
871st
99 Bottles of Beer
349th
Abundant Numbers
61st
387th
Christmas Trees
530th
CSS Colors
18th
Diamonds
344th
Divisors
783rd
Emirp Numbers
358th45th
Evil Numbers
300th
70th364th43rd
Fibonacci
61st313th
197th35th
Fizz Buzz
210th
1st
898th
Happy Numbers
258th
Intersection
375th
Leap Years
334th
447th39th
Leyland Numbers
91st
124th
Look and Say
14th
Niven Numbers
172nd
545th31st
Odious Numbers
63rd318th41st
Ordinal Numbers
120th
Pangram Grep
67th
516th43rd
Pascal’s Triangle
1st
Pernicious Numbers
290th46th
Prime Numbers
71st1st129th
609th30th
Quine
1st1st1st
83rd
Recamán
282nd
Rock-paper-scissors-Spock-lizard
134th
Roman to Arabic
220th
Rule 110
262nd
Vampire Numbers
157th
π
90th
277th
τ
74th
203rd
φ
75th
182nd
√2
48th
242nd
𝑒
73rd
363rd