99 Bottles of Beer
21st
Abundant Numbers
39th
ASCII Table
19th
Catalan Numbers
1st1st
Christmas Trees
4th
Collatz
151st20th
Diamonds
49th
Divisors
46th
Emirp Numbers
38th
Emirp Numbers (Long)
21st
Evil Numbers
252nd4th
Evil Numbers (Long)
33rd
Fibonacci
8th
Fizz Buzz
1st
Foo Fizz Buzz Bar
20th
Fractions
1st
Happy Numbers
38th
Happy Numbers (Long)
25th
Intersection
22nd
Kolakoski Sequence
19th
Leap Years
41st
Leyland Numbers
174th28th
Look and Say
25th
Lucky Numbers
19th
Niven Numbers
7th
Niven Numbers (Long)
1st
Odious Numbers
131st5th
Odious Numbers (Long)
32nd
Pascal’s Triangle
33rd
Pernicious Numbers
44th
Prime Numbers
172nd65th
Prime Numbers (Long)
201st56th
Recamán
29th
Smith Numbers
20th
Van Eck Sequence
16th