12 Days of Christmas
391
Abundant Numbers
649
Abundant Numbers (Long)
862
Arithmetic Numbers
677
Ascending Primes
536
Catalan Numbers
514
Catalan’s Constant
84
Collatz
719
Divisors
780
Emirp Numbers
315
Emirp Numbers (Long)
578
Evil Numbers
770489
Evil Numbers (Long)
844498
Factorial Factorisation
112
Farey Sequence
444
Fibonacci
608
Fizz Buzz
709643501
Foo Fizz Buzz Bar
622676
Fractions
844
Happy Numbers
250
Happy Numbers (Long)
403
Leap Years
701
Look and Say
608
Medal Tally
378
Niven Numbers
541
Niven Numbers (Long)
820
Odious Numbers
786504
Odious Numbers (Long)
877509
Pangram Grep
529
Pernicious Numbers
716
Pernicious Numbers (Long)
743
Prime Numbers
573
Prime Numbers (Long)
763
Quine
596
Recamán
556
Time Distance
421
Tongue-twisters
268
United States
190
π