Abundant Numbers
1,989th2,059th
Abundant Numbers (Long)
1,629th1,420th
Catalan Numbers
135th30th
Christmas Trees
1,080th1,412th
Collatz
855th1,736th
Diamonds
1,075th
Divisors
1,590th1,492nd
Emirp Numbers
1,166th1,424th
Emirp Numbers (Long)
606th829th
Evil Numbers
3,333rd1,100th
Evil Numbers (Long)
1,914th960th
Fibonacci
2,073rd1,172nd
Fizz Buzz
868th3,263rd
Foo Fizz Buzz Bar
549th1,426th
Fractions
866th1,030th
Happy Numbers
1,140th1,308th
Happy Numbers (Long)
809th823rd
Intersection
652nd878th
ISBN
1,047th
Kolakoski Sequence
1,105th1,007th
Leap Years
130th967th
Leyland Numbers
946th532nd
Look and Say
1,052nd1,159th
Morse Encoder
610th
Niven Numbers
2,131st1,754th
Niven Numbers (Long)
954th774th
Odious Numbers
2,843rd883rd
Odious Numbers (Long)
1,735th802nd
Ordinal Numbers
975th1,032nd
Pangram Grep
865th1,097th
Pascal’s Triangle
1,509th660th
Pernicious Numbers
2,490th1,544th
Pernicious Numbers (Long)
1,160th683rd
Prime Numbers
1,871st588th
Prime Numbers (Long)
1,291st104th
Quine
3,179th
Recamán
1,010th621st
Reverse Polish Notation
587th838th
ROT13
608th
Time Distance
370th529th
Van Eck Sequence
959th
√2
1,226th