12 Days of Christmas
392
Abundant Numbers
652
Abundant Numbers (Long)
865
Arithmetic Numbers
679
Ascending Primes
538
Catalan Numbers
516
Catalan’s Constant
84
Collatz
703
Divisors
746
Emirp Numbers
315
Emirp Numbers (Long)
579
Evil Numbers
772490
Evil Numbers (Long)
847499
Factorial Factorisation
113
Farey Sequence
445
Fibonacci
609
Fizz Buzz
710643501
Foo Fizz Buzz Bar
624677
Fractions
849
Happy Numbers
251
Happy Numbers (Long)
404
Leap Years
691
Look and Say
610
Medal Tally
379
Niven Numbers
544
Niven Numbers (Long)
769
Odious Numbers
788505
Odious Numbers (Long)
880510
Pangram Grep
530
Pernicious Numbers
720
Pernicious Numbers (Long)
745
Prime Numbers
575
Prime Numbers (Long)
765
Quine
597
Recamán
558
Time Distance
420
Tongue-twisters
268
United States
191
π