12 Days of Christmas
666
Abundant Numbers
880
Abundant Numbers (Long)
961
Arithmetic Numbers
885
Ascending Primes
678
Catalan Numbers
566
Catalan’s Constant
544
Collatz
818
Divisors
851
Emirp Numbers
510
Emirp Numbers (Long)
750
Evil Numbers
960866
Evil Numbers (Long)
942877
Factorial Factorisation
163
Farey Sequence
487
Fibonacci
650
Fizz Buzz
753941552
Foo Fizz Buzz Bar
812902
Fractions
949
Happy Numbers
374
Happy Numbers (Long)
527
Leap Years
775
Look and Say
707
Medal Tally
528
Niven Numbers
675
Niven Numbers (Long)
927
Odious Numbers
980875
Odious Numbers (Long)
980876
Pangram Grep
617
Pernicious Numbers
833
Pernicious Numbers (Long)
831
Prime Numbers
701
Prime Numbers (Long)
870
Quine
656
Recamán
615
Time Distance
749
Tongue-twisters
440
United States
287
π