Abundant Numbers
2,358th2,181st
Abundant Numbers (Long)
1,698th1,061st
Catalan Numbers
140th42nd
Christmas Trees
1,367th1,123rd
Collatz
1,213th812th
Diamonds
887th
Divisors
1,822nd1,048th
Emirp Numbers
1,214th1,293rd
Emirp Numbers (Long)
696th680th
Evil Numbers
3,375th1,192nd
Evil Numbers (Long)
1,902nd966th
Fibonacci
2,040th1,196th
Fizz Buzz
1,669th2,180th
Foo Fizz Buzz Bar
931st601st
Fractions
912th720th
Happy Numbers
1,093rd1,125th
Happy Numbers (Long)
919th537th
Intersection
744th495th
ISBN
746th
Kolakoski Sequence
1,107th994th
Leap Years
152nd1,010th
Leyland Numbers
997th214th
Look and Say
1,127th1,031st
Morse Encoder
513th
Niven Numbers
2,228th1,897th
Niven Numbers (Long)
995th828th
Odious Numbers
2,854th953rd
Odious Numbers (Long)
1,715th793rd
Ordinal Numbers
1,136th611th
Pangram Grep
1,096th706th
Pascal’s Triangle
1,539th330th
Pernicious Numbers
2,475th1,526th
Pernicious Numbers (Long)
1,155th661st
Prime Numbers
1,961st664th
Prime Numbers (Long)
1,274th102nd
Quine
3,137th
Recamán
1,048th415th
Reverse Polish Notation
725th626th
ROT13
724th
Time Distance
283rd387th
Van Eck Sequence
905th
√2
1,222nd