12 Days of Christmas
874
Abundant Numbers
810
Abundant Numbers (Long)
969
Catalan Numbers
957
Christmas Trees
738
Collatz
932
CSS Colors
612
Cubes
593
Divisors
1,000
Emirp Numbers
861
Emirp Numbers (Long)
800
Evil Numbers
1,000
Evil Numbers (Long)
976
Fibonacci
947
Fizz Buzz
983
Foo Fizz Buzz Bar
1,000
Fractions
793
Game of Life
636
Happy Numbers
747
Happy Numbers (Long)
857
Inventory Sequence
885
Kolakoski Sequence
912
Leap Years
860
Leyland Numbers
986
Look and Say
763
Lucky Numbers
771
Niven Numbers
957
Niven Numbers (Long)
926
Odious Numbers
1,000
Odious Numbers (Long)
1,000
Ordinal Numbers
810
Pangram Grep
1,000
Pascal’s Triangle
1,000
Pernicious Numbers
833
Pernicious Numbers (Long)
912
Prime Numbers
1,000
Prime Numbers (Long)
1,000
Quine
969
Recamán
871
Reverse Polish Notation
940
Smith Numbers
806
Tongue-twisters
660
United States
673
Vampire Numbers
891
Van Eck Sequence
903
π
471
τ
464
φ
757
√2
1,000
𝑒
1,00076