12 Days of Christmas
658
Abundant Numbers
793
Abundant Numbers (Long)
862
Arithmetic Numbers
754
Ascending Primes
588
Catalan Numbers
508
Catalan’s Constant
92
Collatz
721
Divisors
727
Emirp Numbers
454
Emirp Numbers (Long)
664
Evil Numbers
873496
Evil Numbers (Long)
853503
Factorial Factorisation
144
Farey Sequence
445
Fibonacci
601
Fizz Buzz
703641547
Foo Fizz Buzz Bar
738675
Fractions
844
Happy Numbers
336
Happy Numbers (Long)
438
Leap Years
658
Look and Say
626
Medal Tally
447
Niven Numbers
606
Niven Numbers (Long)
761
Odious Numbers
885501
Odious Numbers (Long)
883505
Pangram Grep
538
Pernicious Numbers
735
Pernicious Numbers (Long)
749
Prime Numbers
638
Prime Numbers (Long)
783
Quine
594
Recamán
524
Time Distance
636
Tongue-twisters
427
United States
227
π