Arithmetic Numbers
21st
Ascending Primes
27th
ASCII Table
30th
Christmas Trees
24th
Collatz
31st
Day of Week
1st
Diamonds
26th
Factorial Factorisation
13th
Fibonacci
91st
Fizz Buzz
154th
Fractions
1st
Leap Years
91st
Prime Numbers
95th
ROT13
27th
Sierpiński Triangle
35th
Tower of Hanoi
16th
Transpose Sentence
14th