12 Days of Christmas
232nd
Abundant Numbers
310th
Christmas Trees
76th
Diamonds
427th
Divisors
1st
Emirp Numbers
207th
Evil Numbers
421st
Fibonacci
147th
Fizz Buzz
618th
Happy Numbers
495th
Leap Years
376th
Leyland Numbers
289th
Morse Decoder
102nd
Morse Encoder
100th
Niven Numbers
56th
Odious Numbers
242nd
Ordinal Numbers
159th
Pangram Grep
41st
Pascal’s Triangle
1st
Pernicious Numbers
227th
Prime Numbers
415th
Recamán
148th
Rock-paper-scissors-Spock-lizard
71st
Seven Segment
130th
Sierpiński Triangle
51st
φ
104th
√2
306th
𝑒
203rd