12 Days of Christmas
391
Abundant Numbers
648
Abundant Numbers (Long)
860
Arithmetic Numbers
698
Ascending Primes
606
Catalan Numbers
513
Catalan’s Constant
188
Collatz
725
Divisors
780
Emirp Numbers
314
Emirp Numbers (Long)
634
Evil Numbers
767803
Evil Numbers (Long)
841797
Factorial Factorisation
145
Farey Sequence
444
Fibonacci
606
Fizz Buzz
708914501
Foo Fizz Buzz Bar
620853
Fractions
839
Happy Numbers
250
Happy Numbers (Long)
415
Leap Years
699
Look and Say
620
Medal Tally
390
Niven Numbers
541
Niven Numbers (Long)
818
Odious Numbers
783815
Odious Numbers (Long)
874801
Pangram Grep
543
Pernicious Numbers
714
Pernicious Numbers (Long)
741
Prime Numbers
571
Prime Numbers (Long)
761
Quine
595
Recamán
556
Time Distance
484
Tongue-twisters
267
United States
209
π