12 Days of Christmas
661
Abundant Numbers
805
Abundant Numbers (Long)
878
Arithmetic Numbers
797
Ascending Primes
606
Catalan Numbers
514
Catalan’s Constant
476
Collatz
749
Divisors
780
Emirp Numbers
466
Emirp Numbers (Long)
670
Evil Numbers
874505
Evil Numbers (Long)
859513
Factorial Factorisation
146
Farey Sequence
444
Fibonacci
607
Fizz Buzz
715652549
Foo Fizz Buzz Bar
749685
Fractions
843
Happy Numbers
344
Happy Numbers (Long)
473
Leap Years
714
Look and Say
645
Medal Tally
468
Niven Numbers
623
Niven Numbers (Long)
844
Odious Numbers
891512
Odious Numbers (Long)
892508
Pangram Grep
553
Pernicious Numbers
757
Pernicious Numbers (Long)
766
Prime Numbers
637
Prime Numbers (Long)
786
Quine
595
Recamán
558
Time Distance
684
Tongue-twisters
426
United States
260
π