Abundant Numbers
458th38th
Abundant Numbers (Long)
212th33rd
Arithmetic Numbers
28th
Catalan Numbers
223rd
Collatz
92nd
503rd
Cubes
39th
Diamonds
21st
Divisors
424th42nd
Emirp Numbers
74th
Emirp Numbers (Long)
35th
Evil Numbers
1,041st
Evil Numbers (Long)
161st24th
Fibonacci
403rd
187th91st
Fizz Buzz
137th50th57th411th274th42nd155th
Foo Fizz Buzz Bar
19th
Fractions
90th
Happy Numbers
177th
Happy Numbers (Long)
48th24th
68th
Intersection
16th
Leap Years
58th
224th29th
Lucky Numbers
97th
Niven Numbers
42nd
Niven Numbers (Long)
1st
Odious Numbers
790th
Odious Numbers (Long)
422nd35th
Ordinal Numbers
33rd
Pascal’s Triangle
217th56th
Pernicious Numbers
69th
Pernicious Numbers (Long)
32nd
Prime Numbers
27th
Prime Numbers (Long)
240th1st
Quine
72nd
Recamán
308th41st
Tongue-twisters
52nd
Tower of Hanoi
75th
√2
21st