12 Days of Christmas
444th99 Bottles of Beer
510thAbundant Numbers
503rdArabic to Roman
242ndChristmas Trees
372ndDiamonds
210thDivisors
865thEmirp Numbers
260thEvil Numbers
898thFibonacci
1,048thFizz Buzz
1,653rdHappy Numbers
285thLeap Years
447thNiven Numbers
575thOdious Numbers
647thOrdinal Numbers
163rdPangram Grep
461stPascalβs Triangle
436thPernicious Numbers
373rdPrime Numbers
678thQuine
52nd