99 Bottles of Beer
7th
Christmas Trees
7th
Collatz
11th
Day of Week
1st
Divisors
14th
Emirp Numbers
8th
Emirp Numbers (Long)
5th
Evil Numbers
9th
Evil Numbers (Long)
7th
Farey Sequence
6th
Fibonacci
13th
Fizz Buzz
30th
Foo Fizz Buzz Bar
14th
Happy Numbers
11th
Happy Numbers (Long)
11th
Look and Say
7th
Lucky Numbers
9th
Niven Numbers
17th
Niven Numbers (Long)
12th
Odious Numbers
9th
Odious Numbers (Long)
8th
Pascal’s Triangle
1st
Pernicious Numbers
15th
Pernicious Numbers (Long)
5th
Prime Numbers
9th
Prime Numbers (Long)
7th
Quine
14th
Sierpiński Triangle
7th
π
6th