12 Days of Christmas
391
Abundant Numbers
651
Abundant Numbers (Long)
864
Arithmetic Numbers
677
Ascending Primes
536
Catalan Numbers
515
Catalan’s Constant
84
Collatz
702
Divisors
746
Emirp Numbers
315
Emirp Numbers (Long)
578
Evil Numbers
772489
Evil Numbers (Long)
846499
Factorial Factorisation
113
Farey Sequence
445
Fibonacci
609
Fizz Buzz
710643501
Foo Fizz Buzz Bar
624677
Fractions
847
Happy Numbers
250
Happy Numbers (Long)
403
Leap Years
690
Look and Say
610
Medal Tally
378
Niven Numbers
543
Niven Numbers (Long)
769
Odious Numbers
788505
Odious Numbers (Long)
879510
Pangram Grep
529
Pernicious Numbers
718
Pernicious Numbers (Long)
744
Prime Numbers
575
Prime Numbers (Long)
764
Quine
597
Recamán
556
Time Distance
418
Tongue-twisters
268
United States
190
π