Abundant Numbers
538
450
Abundant Numbers (Long)
577
500
Arithmetic Numbers
490
Catalan Numbers
370
Collatz
496
Divisors
550
Evil Numbers
364
Fibonacci
500
Fizz Buzz
390
Fractions
267
Happy Numbers
381
Happy Numbers (Long)
473
Leap Years
620
597
Leyland Numbers
395
ln 2
642
Niven Numbers
587
Niven Numbers (Long)
649
Odious Numbers
364
Odious Numbers (Long)
363
Pascal’s Triangle
427
Prime Numbers
490
421
Prime Numbers (Long)
521
454
Recamán
458
φ
437
√2
563
𝑒
516