12 Days of Christmas
392
Abundant Numbers
639
Abundant Numbers (Long)
849
Arithmetic Numbers
660
Ascending Primes
528
Catalan Numbers
507
Catalan’s Constant
79
Collatz
694
Divisors
726
Emirp Numbers
308
Emirp Numbers (Long)
567
Evil Numbers
765488
Evil Numbers (Long)
837496
Factorial Factorisation
111
Farey Sequence
445
Fibonacci
601
Fizz Buzz
704642500
Foo Fizz Buzz Bar
621676
Fractions
847
Happy Numbers
244
Happy Numbers (Long)
396
Leap Years
644
Look and Say
596
Medal Tally
366
Niven Numbers
529
Niven Numbers (Long)
751
Odious Numbers
776501
Odious Numbers (Long)
865505
Pangram Grep
518
Pernicious Numbers
706
Pernicious Numbers (Long)
721
Prime Numbers
572
Prime Numbers (Long)
758
Quine
594
Recamán
537
Time Distance
418
Tongue-twisters
268
United States
189
π