12 Days of Christmas
431
99 Bottles of Beer
432
Abundant Numbers
750
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Christmas Trees
714
Diamonds
514
Divisors
817
Emirp Numbers
392
Evil Numbers
521
Fibonacci
717
Fizz Buzz
1,000
Happy Numbers
381
Leap Years
588
Niven Numbers
764
Odious Numbers
552
Pangram Grep
Pascal’s Triangle
366
Pernicious Numbers
430
Prime Numbers
571
Roman to Arabic
420
Seven Segment
429
Sierpiński Triangle
235
Spelling Numbers
λ
124
π
88
τ
61
φ
49
√2
51
𝑒
50