12 Days of Christmas
391
Abundant Numbers
648
Abundant Numbers (Long)
860
Arithmetic Numbers
698
Ascending Primes
606
Catalan Numbers
514
Catalan’s Constant
188
Collatz
717
Divisors
780
Emirp Numbers
314
Emirp Numbers (Long)
634
Evil Numbers
768497
Evil Numbers (Long)
842505
Factorial Factorisation
122
Farey Sequence
444
Fibonacci
607
Fizz Buzz
709650501
Foo Fizz Buzz Bar
620680
Fractions
843
Happy Numbers
250
Happy Numbers (Long)
416
Leap Years
700
Look and Say
607
Medal Tally
378
Niven Numbers
541
Niven Numbers (Long)
818
Odious Numbers
784512
Odious Numbers (Long)
875508
Pangram Grep
525
Pernicious Numbers
714
Pernicious Numbers (Long)
742
Prime Numbers
571
Prime Numbers (Long)
761
Quine
595
Recamán
556
Time Distance
484
Tongue-twisters
267
United States
205
π