Abundant Numbers
490
551
Abundant Numbers (Long)
519
524
Arithmetic Numbers
544
Catalan Numbers
253
Collatz
418
556
644
564
Day of Week
511
Divisors
448
763
574
Emirp Numbers
342
Evil Numbers
462
Evil Numbers (Long)
469
Fibonacci
338
556
Fizz Buzz
894
Happy Numbers
312
Happy Numbers (Long)
394
Leap Years
394
559
ln 2
505
Niven Numbers
327
364
Niven Numbers (Long)
414
533
407
Odious Numbers
469
Odious Numbers (Long)
469
Pernicious Numbers
280
Pernicious Numbers (Long)
352
Prime Numbers
331
455
548
494
Prime Numbers (Long)
346
565
530
Quine
447
RecamΓ‘n
545
Ο
136
Ο
164
Ο
505
β2
521