12 Days of Christmas
391
Abundant Numbers
647
Abundant Numbers (Long)
858
Arithmetic Numbers
704
Ascending Primes
606
Catalan Numbers
513
Catalan’s Constant
188
Collatz
733
Divisors
779
Emirp Numbers
314
Emirp Numbers (Long)
634
Evil Numbers
766802
Evil Numbers (Long)
840796
Factorial Factorisation
145
Farey Sequence
444
Fibonacci
606
Fizz Buzz
708914501
Foo Fizz Buzz Bar
620852
Fractions
839
Happy Numbers
250
Happy Numbers (Long)
414
Leap Years
698
Look and Say
643
Medal Tally
394
Niven Numbers
540
Niven Numbers (Long)
817
Odious Numbers
782815
Odious Numbers (Long)
873800
Pangram Grep
543
Pernicious Numbers
713
Pernicious Numbers (Long)
740
Prime Numbers
570
Prime Numbers (Long)
760
Quine
595
Recamán
555
Time Distance
484
Tongue-twisters
267
United States
209
π