12 Days of Christmas
124
99 Bottles of Beer
695
Abundant Numbers
532
Abundant Numbers (Long)
581
Arabic to Roman
244
Arithmetic Numbers
630
Arrows
512
Ascending Primes
148
ASCII Table
411
Card Number Validation
639
Catalan Numbers
491
Christmas Trees
145
Collatz
651
CSS Colors
108
Day of Week
696
Divisors
705601
Emirp Numbers
331
Evil Numbers
552980
Evil Numbers (Long)
565949
Factorial Factorisation
518
Farey Sequence
547
Fibonacci
809858961932
Fizz Buzz
711962
Foo Fizz Buzz Bar
689
Forsyth–Edwards Notation
266
Fractions
574
Happy Numbers
539
Happy Numbers (Long)
586
ISBN
599
Leap Years
737
Leyland Numbers
777
ln 2
907
Look and Say
610
Niven Numbers
582
Niven Numbers (Long)
562
Odious Numbers
906977
Odious Numbers (Long)
571968
Ordinal Numbers
533
Pascal’s Triangle
357
Pernicious Numbers
333
Pernicious Numbers (Long)
380
Prime Numbers
453
Prime Numbers (Long)
472
Recamán
576
Set
466
Spelling Numbers
315
United States
67
π
324
τ
308