12 Days of Christmas
Abundant Numbers
2,946th
brainfuck
Catalan Numbers
Christmas Trees
Collatz
Cubes
Diamonds
Divisors
4,082nd
Emirp Numbers
Evil Numbers
3,617th
2,956th
Fibonacci
5,898th
3,446th
934th
6,030th
941st
7,341st
2,788th
Fizz Buzz
Fractions
1,381st
1,215th
Happy Numbers
2,002nd
Happy Numbers (Long)
Leap Years
Leyland Numbers
Look and Say
Niven Numbers
Odious Numbers
2,953rd
Pascal’s Triangle
Pernicious Numbers
2,192nd
Prime Numbers
3,808th
3,008th
1,765th
3,590th
Quine
Recamán
Reverse Polish Notation
Roman to Arabic
Rule 110
Sierpiński Triangle
Smith Numbers
Sudoku
Sudoku (Fill-in)
Van Eck Sequence
√2