12 Days of Christmas
392
Abundant Numbers
640
Abundant Numbers (Long)
850
Arithmetic Numbers
662
Ascending Primes
529
Catalan Numbers
508
Catalan’s Constant
79
Collatz
694
Divisors
727
Emirp Numbers
308
Emirp Numbers (Long)
568
Evil Numbers
767488
Evil Numbers (Long)
836495
Factorial Factorisation
111
Farey Sequence
445
Fibonacci
601
Fizz Buzz
703641500
Foo Fizz Buzz Bar
616674
Fractions
844
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
777501
Odious Numbers (Long)
866505
Pangram Grep
511
Pernicious Numbers
706
Pernicious Numbers (Long)
721
Prime Numbers
572
Prime Numbers (Long)
758
Quine
594
Recamán
524
Time Distance
412
Tongue-twisters
267
United States
189
π