12 Days of Christmas
Abundant Numbers
2,961st
brainfuck
Catalan Numbers
Christmas Trees
Collatz
Cubes
Diamonds
Divisors
4,044th
Emirp Numbers
Evil Numbers
3,609th
2,988th
Fibonacci
5,962nd
3,421st
1,760th
5,997th
893rd
7,317th
2,733rd
Fizz Buzz
Fractions
1,326th
1,126th
Happy Numbers
2,125th
Happy Numbers (Long)
Leap Years
Leyland Numbers
Look and Say
Niven Numbers
Odious Numbers
2,955th
Pascal’s Triangle
Pernicious Numbers
2,202nd
Prime Numbers
3,790th
2,963rd
1,887th
3,510th
Quine
Recamán
Reverse Polish Notation
Roman to Arabic
Rule 110
Sierpiński Triangle
Smith Numbers
Sudoku
Sudoku (Fill-in)
Van Eck Sequence
√2