12 Days of Christmas
661
Abundant Numbers
808
Abundant Numbers (Long)
881
Arithmetic Numbers
769
Ascending Primes
596
Catalan Numbers
515
Catalan’s Constant
103
Collatz
750
Divisors
781
Emirp Numbers
467
Emirp Numbers (Long)
674
Evil Numbers
877497
Evil Numbers (Long)
862506
Factorial Factorisation
146
Farey Sequence
444
Fibonacci
608
Fizz Buzz
716645549
Foo Fizz Buzz Bar
752680
Fractions
844
Happy Numbers
344
Happy Numbers (Long)
446
Leap Years
716
Look and Say
646
Medal Tally
463
Niven Numbers
625
Niven Numbers (Long)
847
Odious Numbers
894504
Odious Numbers (Long)
896510
Pangram Grep
557
Pernicious Numbers
760
Pernicious Numbers (Long)
769
Prime Numbers
641
Prime Numbers (Long)
789
Quine
597
Recamán
558
Time Distance
666
Tongue-twisters
427
United States
234
π