12 Days of Christmas
222nd
Abundant Numbers
374th
Arabic to Roman
81st
Catalan Numbers
171st
Christmas Trees
96th
Diamonds
134th
Divisors
395th
Emirp Numbers
275th
Evil Numbers
200th1,079th
Fibonacci
189th
Fizz Buzz
59th
Foo Fizz Buzz Bar
1st
ISBN
126th
Leap Years
509th
Niven Numbers
488th
Odious Numbers
150th
Ordinal Numbers
229th
Pascal’s Triangle
214th
Prime Numbers
767th
Prime Numbers (Long)
410th
Quine
75th
Rock-paper-scissors-Spock-lizard
60th
Seven Segment
56th
Van Eck Sequence
131st