12 Days of Christmas
Abundant Numbers
3,000th
brainfuck
Catalan Numbers
Christmas Trees
Collatz
Cubes
Diamonds
Divisors
4,094th
Emirp Numbers
Evil Numbers
3,656th3,018th
Fibonacci
6,074th3,476th1,811th6,110th913th7,456th2,771st
Fizz Buzz
Fractions
1,370th1,162nd
Happy Numbers
2,166th
Happy Numbers (Long)
Leap Years
Leyland Numbers
Look and Say
Niven Numbers
Odious Numbers
2,991st
Pascal’s Triangle
Pernicious Numbers
2,223rd
Prime Numbers
3,831st2,999th1,908th3,552nd
Quine
Recamán
Reverse Polish Notation
Roman to Arabic
Rule 110
Sierpiński Triangle
Smith Numbers
Sudoku
Sudoku (Fill-in)
Van Eck Sequence
√2