12 Days of Christmas
284th
Abundant Numbers
400th
Arabic to Roman
124th
Catalan Numbers
168th
Christmas Trees
141st
Diamonds
150th
Divisors
424th
Emirp Numbers
298th
Evil Numbers
196th1,067th
Fibonacci
186th
Fizz Buzz
209th
Foo Fizz Buzz Bar
131st
ISBN
147th
Leap Years
512th
Niven Numbers
480th
Odious Numbers
146th
Ordinal Numbers
244th
Pascal’s Triangle
225th
Prime Numbers
764th
Prime Numbers (Long)
400th
Quine
72nd
Rock-paper-scissors-Spock-lizard
81st
Seven Segment
81st
Van Eck Sequence
144th