12 Days of Christmas
661
Abundant Numbers
804
Abundant Numbers (Long)
877
Arithmetic Numbers
796
Ascending Primes
606
Catalan Numbers
513
Catalan’s Constant
475
Collatz
746
Divisors
779
Emirp Numbers
477
Emirp Numbers (Long)
670
Evil Numbers
871810
Evil Numbers (Long)
856803
Factorial Factorisation
146
Farey Sequence
444
Fibonacci
606
Fizz Buzz
715916549
Foo Fizz Buzz Bar
749856
Fractions
839
Happy Numbers
343
Happy Numbers (Long)
471
Leap Years
711
Look and Say
643
Medal Tally
477
Niven Numbers
623
Niven Numbers (Long)
843
Odious Numbers
889815
Odious Numbers (Long)
890799
Pangram Grep
551
Pernicious Numbers
755
Pernicious Numbers (Long)
764
Prime Numbers
636
Prime Numbers (Long)
784
Quine
594
Recamán
557
Time Distance
684
Tongue-twisters
445
United States
261
π