12 Days of Christmas
666
Abundant Numbers
880
Abundant Numbers (Long)
961
Arithmetic Numbers
850
Ascending Primes
664
Catalan Numbers
566
Catalan’s Constant
112
Collatz
798
Divisors
811
Emirp Numbers
503
Emirp Numbers (Long)
750
Evil Numbers
960527
Evil Numbers (Long)
942544
Factorial Factorisation
162
Farey Sequence
487
Fibonacci
650
Fizz Buzz
753659552
Foo Fizz Buzz Bar
812710
Fractions
949
Happy Numbers
374
Happy Numbers (Long)
495
Leap Years
761
Look and Say
698
Medal Tally
522
Niven Numbers
675
Niven Numbers (Long)
854
Odious Numbers
980536
Odious Numbers (Long)
980549
Pangram Grep
617
Pernicious Numbers
817
Pernicious Numbers (Long)
831
Prime Numbers
701
Prime Numbers (Long)
870
Quine
656
Recamán
615
Time Distance
721
Tongue-twisters
440
United States
253
π