Abundant Numbers
823rd
Abundant Numbers (Long)
368th
Arithmetic Numbers
432nd
Catalan Numbers
736th
Collatz
345th
Divisors
4,080th1,918th
Evil Numbers
1,545th
200th
Evil Numbers (Long)
1,567th
Fibonacci
2,650th
Fizz Buzz
2,311th3,507th
Foo Fizz Buzz Bar
1,320th
Happy Numbers
1,213th
Happy Numbers (Long)
859th
Leap Years
1,293rd
Leyland Numbers
885th
Niven Numbers
2,197th
Niven Numbers (Long)
1,050th
Odious Numbers
2,270th1,117th1,618th
Odious Numbers (Long)
1,419th
Pascal’s Triangle
1,397th1,564th
Pernicious Numbers
1,739th
Prime Numbers
1,823rd
Prime Numbers (Long)
1,274th
Recamán
657th
Smith Numbers
644th
Sudoku
311th
Van Eck Sequence
718th