12 Days of Christmas
661
Abundant Numbers
803
Abundant Numbers (Long)
875
Arithmetic Numbers
796
Ascending Primes
606
Catalan Numbers
512
Catalan’s Constant
475
Collatz
746
Divisors
777
Emirp Numbers
476
Emirp Numbers (Long)
670
Evil Numbers
870809
Evil Numbers (Long)
855802
Factorial Factorisation
146
Farey Sequence
443
Fibonacci
605
Fizz Buzz
714915549
Foo Fizz Buzz Bar
749856
Fractions
837
Happy Numbers
342
Happy Numbers (Long)
471
Leap Years
711
Look and Say
643
Medal Tally
477
Niven Numbers
622
Niven Numbers (Long)
843
Odious Numbers
888814
Odious Numbers (Long)
889799
Pangram Grep
551
Pernicious Numbers
754
Pernicious Numbers (Long)
763
Prime Numbers
635
Prime Numbers (Long)
783
Quine
593
Recamán
557
Time Distance
684
Tongue-twisters
446
United States
261
π
68