12 Days of Christmas
594
Abundant Numbers
793
Abundant Numbers (Long)
863
Arithmetic Numbers
754
Ascending Primes
588
Catalan Numbers
508
Catalan’s Constant
85
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
704641547
Foo Fizz Buzz Bar
738675
Fractions
844
Happy Numbers
336
Happy Numbers (Long)
433
Leap Years
658
Look and Say
626
Medal Tally
447
Niven Numbers
606
Niven Numbers (Long)
761
Odious Numbers
885502
Odious Numbers (Long)
883506
Pangram Grep
539
Pernicious Numbers
736
Pernicious Numbers (Long)
749
Prime Numbers
638
Prime Numbers (Long)
783
Quine
594
Recamán
524
Time Distance
635
Tongue-twisters
427
United States
227
π