12 Days of Christmas
661
Abundant Numbers
805
Abundant Numbers (Long)
878
Arithmetic Numbers
797
Ascending Primes
606
Catalan Numbers
513
Catalan’s Constant
476
Collatz
748
Divisors
780
Emirp Numbers
466
Emirp Numbers (Long)
670
Evil Numbers
872811
Evil Numbers (Long)
858805
Factorial Factorisation
146
Farey Sequence
444
Fibonacci
606
Fizz Buzz
715916549
Foo Fizz Buzz Bar
749857
Fractions
839
Happy Numbers
343
Happy Numbers (Long)
472
Leap Years
713
Look and Say
643
Medal Tally
466
Niven Numbers
623
Niven Numbers (Long)
844
Odious Numbers
890815
Odious Numbers (Long)
891801
Pangram Grep
551
Pernicious Numbers
757
Pernicious Numbers (Long)
765
Prime Numbers
637
Prime Numbers (Long)
786
Quine
595
Recamán
558
Time Distance
684
Tongue-twisters
426
United States
262
π