Abundant Numbers
Abundant Numbers (Long)
Arithmetic Numbers
Catalan Numbers
691st
Collatz
Divisors
3,949th1,847th
Evil Numbers
1,482nd
184th
Evil Numbers (Long)
Fibonacci
2,554th
Fizz Buzz
2,283rd685th
Foo Fizz Buzz Bar
886th
Happy Numbers
Happy Numbers (Long)
Leap Years
1,240th
Leyland Numbers
846th
Niven Numbers
2,043rd
Niven Numbers (Long)
986th
Odious Numbers
1,063rd1,540th
Odious Numbers (Long)
Pascal’s Triangle
1,492nd
Pernicious Numbers
Prime Numbers
1,754th
Prime Numbers (Long)
1,206th
Recamán
631st
Smith Numbers
Sudoku
297th
Van Eck Sequence