12 Days of Christmas
173rd
99 Bottles of Beer
315th
Abundant Numbers
167th
Christmas Trees
338th
Collatz
121st
Divisors
420th
Emirp Numbers
365th
Evil Numbers
487th
Fibonacci
801st132nd
Fizz Buzz
1,440th
Happy Numbers
269th
Morse Decoder
125th
Niven Numbers
205th
Odious Numbers
297th
Pangram Grep
Pascal’s Triangle
406th
Pernicious Numbers
223rd
Prime Numbers
468th
Quine
1st72nd
Recamán
55th
Roman to Arabic
171st
Seven Segment
118th
Sierpiński Triangle
121st
Spelling Numbers
94th
United States