Abundant Numbers
831st
Abundant Numbers (Long)
398th
Arithmetic Numbers
452nd
Catalan Numbers
774th
Collatz
241st
Divisors
4,085th1,974th
Evil Numbers
1,554th
213th
Evil Numbers (Long)
1,630th
Fibonacci
2,670th
Fizz Buzz
2,181st3,328th
Foo Fizz Buzz Bar
1,314th
Happy Numbers
1,271st
Happy Numbers (Long)
891st
Leap Years
1,268th
Leyland Numbers
925th
Niven Numbers
2,270th
Niven Numbers (Long)
1,079th
Odious Numbers
2,353rd1,148th1,661st
Odious Numbers (Long)
1,490th
Pascal’s Triangle
1,449th1,627th
Pernicious Numbers
1,832nd
Prime Numbers
1,835th
Prime Numbers (Long)
1,320th
Recamán
670th
Smith Numbers
683rd
Sudoku
320th
Van Eck Sequence
751st