Abundant Numbers
4th
Abundant Numbers (Long)
4th
Catalan Numbers
9th
Catalan’s Constant
1st
Christmas Trees
4th
Diamonds
4th
Fibonacci
1st
Fizz Buzz
3rd
Fractions
2nd
Happy Numbers
1st
Happy Numbers (Long)
1st
Intersection
2nd
Kolakoski Sequence
3rd
Lucky Numbers
3rd
Niven Numbers
13th
Niven Numbers (Long)
1st
Pangram Grep
5th
Pernicious Numbers
14th
Quine
1st
Recamán
4th
Smith Numbers
2nd
Vampire Numbers
2nd
γ
1st
π
1st
τ
1st
φ
1st
√2
1st
𝑒
1st