12 Days of Christmas
61st
Abundant Numbers
111th29th
Abundant Numbers (Long)
331st21st
Arithmetic Numbers
121st29th
Arrows
94th
Card Number Validation
77th
Catalan Numbers
69th
Collatz
37th47th
Divisors
173rd98th1st
Emirp Numbers
191st
Evil Numbers
221st17th15th
Evil Numbers (Long)
137th8th
Farey Sequence
95th
Fibonacci
90th150th63rd
Fizz Buzz
531st78th15th
Foo Fizz Buzz Bar
378th
Fractions
92nd
Happy Numbers
265th
17th
Intersection
48th
Kolakoski Sequence
53rd18th
Leap Years
255th46th
Leyland Numbers
260th17th
ln 2
150th
Look and Say
8th
Niven Numbers
278th
Niven Numbers (Long)
101st
Odious Numbers
123rd16th16th
Odious Numbers (Long)
153rd19th
Pascal’s Triangle
34th
Pernicious Numbers
93rd29th14th
Pernicious Numbers (Long)
177th
Prime Numbers
54th136th17th
Prime Numbers (Long)
126th1st
Quine
56th
Recamán
273rd
Van Eck Sequence
50th
Zeckendorf Representation
21st
φ
47th
√2
142nd
𝑒
225th