Abundant Numbers
1,988th2,043rd
Abundant Numbers (Long)
1,550th1,351st
Catalan Numbers
123rd28th
Christmas Trees
1,060th1,382nd
Collatz
838th1,674th
Diamonds
1,034th
Divisors
1,546th1,455th
Emirp Numbers
1,108th1,353rd
Emirp Numbers (Long)
580th777th
Evil Numbers
3,249th1,048th
Evil Numbers (Long)
1,802nd912th
Fibonacci
2,021st1,136th
Fizz Buzz
991st3,449th
Foo Fizz Buzz Bar
550th1,403rd
Fractions
834th991st
Happy Numbers
1,088th1,239th
Happy Numbers (Long)
759th773rd
Intersection
620th827th
ISBN
992nd
Kolakoski Sequence
1,058th975th
Leap Years
119th976th
Leyland Numbers
890th494th
Look and Say
1,007th1,104th
Morse Encoder
583rd
Niven Numbers
2,042nd1,679th
Niven Numbers (Long)
910th738th
Odious Numbers
2,716th832nd
Odious Numbers (Long)
1,618th759th
Ordinal Numbers
947th1,002nd
Pangram Grep
838th1,065th
Pascal’s Triangle
1,440th641st
Pernicious Numbers
2,347th1,436th
Pernicious Numbers (Long)
1,093rd648th
Prime Numbers
1,821st2,252nd
Prime Numbers (Long)
1,224th1,339th
Quine
3,286th
Recamán
965th600th
Reverse Polish Notation
563rd807th
ROT13
543rd
Time Distance
351st496th
Van Eck Sequence
895th
√2
1,173rd