12 Days of Christmas
391
Abundant Numbers
650
Abundant Numbers (Long)
863
Arithmetic Numbers
677
Ascending Primes
536
Catalan Numbers
515
Catalan’s Constant
84
Collatz
719
Divisors
781
Emirp Numbers
315
Emirp Numbers (Long)
578
Evil Numbers
771489
Evil Numbers (Long)
845498
Factorial Factorisation
112
Farey Sequence
444
Fibonacci
608
Fizz Buzz
709643501
Foo Fizz Buzz Bar
623676
Fractions
844
Happy Numbers
250
Happy Numbers (Long)
403
Leap Years
702
Look and Say
608
Medal Tally
378
Niven Numbers
542
Niven Numbers (Long)
821
Odious Numbers
787504
Odious Numbers (Long)
878510
Pangram Grep
529
Pernicious Numbers
717
Pernicious Numbers (Long)
744
Prime Numbers
574
Prime Numbers (Long)
764
Quine
597
Recamán
556
Time Distance
421
Tongue-twisters
268
United States
190
π