Abundant Numbers
512
Abundant Numbers (Long)
513
Arithmetic Numbers
431
Card Number Validation
504
Catalan Numbers
442
Collatz
569
Divisors
577
Evil Numbers (Long)
441
Factorial Factorisation
273
Farey Sequence
436
Fibonacci
523
Fizz Buzz
531
Gijswijt’s Sequence
405
Happy Numbers
327
Happy Numbers (Long)
453
Intersection
536
Inventory Sequence
397
ISBN
457
Jacobi Symbol
311
Kaprekar Numbers
493
Kolakoski Sequence
355
Leap Years
440
Leyland Numbers
261
N Queens
364
Niven Numbers
719
Niven Numbers (Long)
834
Odious Numbers
512
Ordinal Numbers
513
Pangram Grep
525
Pascal’s Triangle
267
Pernicious Numbers
325
Prime Numbers
517
Prime Numbers (Long)
605
Recamán
540
Reverse Polish Notation
312
Roman to Arabic
384
Rule 110
274
SI Units
410
√2
201