12 Days of Christmas
671
Abundant Numbers
803
Abundant Numbers (Long)
874
Arithmetic Numbers
796
Ascending Primes
606
Catalan Numbers
512
Catalan’s Constant
475
Collatz
746
Divisors
777
Emirp Numbers
476
Emirp Numbers (Long)
670
Evil Numbers
869809
Evil Numbers (Long)
854801
Factorial Factorisation
146
Farey Sequence
443
Fibonacci
605
Fizz Buzz
714915549
Foo Fizz Buzz Bar
749856
Fractions
837
Happy Numbers
342
Happy Numbers (Long)
471
Leap Years
711
Look and Say
642
Medal Tally
477
Niven Numbers
622
Niven Numbers (Long)
843
Odious Numbers
888814
Odious Numbers (Long)
888798
Pangram Grep
551
Pernicious Numbers
754
Pernicious Numbers (Long)
761
Prime Numbers
634
Prime Numbers (Long)
782
Quine
592
Recamán
557
Time Distance
684
Tongue-twisters
447
United States
270
π
68