12 Days of Christmas
54th
Abundant Numbers
46th
Abundant Numbers (Long)
34th
Arithmetic Numbers
27th
Collatz
46th
Cubes
18th
Diamonds
25th
Fibonacci
202nd1st
Fizz Buzz
118th
Foo Fizz Buzz Bar
17th
Happy Numbers
18th
Happy Numbers (Long)
14th
Hilbert Curve
2nd
Leap Years
33rd
ln 2
10th
Look and Say
27th
Lucky Numbers
14th
Mandelbrot
10th
Niven Numbers
52nd
Niven Numbers (Long)
27th
Pascal’s Triangle
37th
Quine
104th
Tongue-twisters
22nd
Trinomial Triangle
7th
γ
7th
λ
15th
π
20th
τ
14th
φ
21st
√2
13th
𝑒
19th