12 Days of Christmas
188
99 Bottles of Beer
709
Abundant Numbers
538
Abundant Numbers (Long)
596
Arabic to Roman
249
Arithmetic Numbers
639
Arrows
399
Ascending Primes
149
ASCII Table
417
Card Number Validation
645
Catalan Numbers
494
Christmas Trees
146
Collatz
657
CSS Colors
206
Day of Week
694
Divisors
713608
Emirp Numbers
465
Evil Numbers
563982
Evil Numbers (Long)
572953
Factorial Factorisation
522
Farey Sequence
546
Fibonacci
830873964935
Fizz Buzz
715968
Foo Fizz Buzz Bar
696
Forsyth–Edwards Notation
262
Fractions
574
Happy Numbers
637
Happy Numbers (Long)
600
ISBN
613
Leap Years
744
Leyland Numbers
787
ln 2
911
Look and Say
617
Niven Numbers
591
Niven Numbers (Long)
602
Odious Numbers
912980
Odious Numbers (Long)
577974
Ordinal Numbers
537
Pascal’s Triangle
359
Pernicious Numbers
336
Pernicious Numbers (Long)
397
Prime Numbers
481
Prime Numbers (Long)
474
Recamán
584
Set
469
Spelling Numbers
407
United States
72
π
330
τ
316