12 Days of Christmas
401
Abundant Numbers
645
Abundant Numbers (Long)
854
Arithmetic Numbers
703
Ascending Primes
604
Catalan Numbers
510
Catalan’s Constant
187
Collatz
732
Divisors
776
Emirp Numbers
313
Emirp Numbers (Long)
631
Evil Numbers
763801
Evil Numbers (Long)
836793
Factorial Factorisation
145
Farey Sequence
447
Fibonacci
605
Fizz Buzz
707913501
Foo Fizz Buzz Bar
619851
Fractions
837
Happy Numbers
249
Happy Numbers (Long)
413
Leap Years
695
Look and Say
640
Medal Tally
394
Niven Numbers
538
Niven Numbers (Long)
823
Odious Numbers
780813
Odious Numbers (Long)
869797
Pangram Grep
539
Pernicious Numbers
710
Pernicious Numbers (Long)
736
Prime Numbers
568
Prime Numbers (Long)
755
Quine
591
Recamán
554
Time Distance
484
Tongue-twisters
266
United States
208
π
67