12 Days of Christmas
661
Abundant Numbers
810
Abundant Numbers (Long)
882
Arithmetic Numbers
769
Ascending Primes
596
Catalan Numbers
515
Catalan’s Constant
103
Collatz
733
Divisors
746
Emirp Numbers
461
Emirp Numbers (Long)
674
Evil Numbers
878498
Evil Numbers (Long)
863507
Factorial Factorisation
146
Farey Sequence
445
Fibonacci
609
Fizz Buzz
717645549
Foo Fizz Buzz Bar
752680
Fractions
847
Happy Numbers
344
Happy Numbers (Long)
446
Leap Years
704
Look and Say
640
Medal Tally
463
Niven Numbers
626
Niven Numbers (Long)
784
Odious Numbers
896505
Odious Numbers (Long)
897510
Pangram Grep
557
Pernicious Numbers
748
Pernicious Numbers (Long)
769
Prime Numbers
641
Prime Numbers (Long)
790
Quine
597
Recamán
558
Time Distance
664
Tongue-twisters
427
United States
234
π