12 Days of Christmas
295304
99 Bottles of Beer
277
Abundant Numbers
321
Abundant Numbers (Long)
318516
Arithmetic Numbers
255415
Christmas Trees
120
Collatz
495402
Divisors
486
Emirp Numbers
243230
Emirp Numbers (Long)
373260
Evil Numbers
342
Evil Numbers (Long)
433
Factorial Factorisation
328
Fibonacci
312234
Fizz Buzz
274323
Foo Fizz Buzz Bar
276243
Happy Numbers
123
Happy Numbers (Long)
169
Leap Years
453
Niven Numbers
250
Odious Numbers
208
Pernicious Numbers
146
Prime Numbers
254370
Smith Numbers
136
Vampire Numbers
107