12 Days of Christmas
600th60th
99 Bottles of Beer
49th
Arabic to Roman
57th
Arrows
40th
CSS Colors
39th
Day of Week
1st
Fizz Buzz
152nd732nd1st
Happy Numbers (Long)
371st61st
Look and Say
61st
Lucky Tickets
165th34th
Number Spiral
214th40th
Pascal’s Triangle
465th78th
Pernicious Numbers
96th
Recamán
52nd