12 Days of Christmas
530th53rd
99 Bottles of Beer
41st
Arabic to Roman
50th
Arrows
35th
CSS Colors
34th
Day of Week
1st
Fizz Buzz
148th671st1st
Happy Numbers (Long)
327th53rd
Look and Say
48th
Lucky Tickets
138th26th
Number Spiral
179th28th
Pascal’s Triangle
420th69th
Pernicious Numbers
85th
Recamán
44th