12 Days of Christmas
305316
99 Bottles of Beer
290
Abundant Numbers
327
Abundant Numbers (Long)
340529
Arithmetic Numbers
276425
Christmas Trees
129
Collatz
524410
Divisors
510
Emirp Numbers
258234
Emirp Numbers (Long)
407267
Evil Numbers
363
Evil Numbers (Long)
464
Factorial Factorisation
357
Fibonacci
324237
Fizz Buzz
281325
Foo Fizz Buzz Bar
290246
Happy Numbers
132
Happy Numbers (Long)
184
Leap Years
474
Niven Numbers
264
Odious Numbers
221
Pernicious Numbers
156
Prime Numbers
268377
Smith Numbers
148
Vampire Numbers
117