12 Days of Christmas
775883
99 Bottles of Beer
825
Abundant Numbers
784
Christmas Trees
626
Collatz
878
Diamonds
380
Divisors
891
Fibonacci
926
Fizz Buzz
873834
Happy Numbers
502
Intersection
692
Kolakoski Sequence
641
Leap Years
756
Look and Say
648628
Niven Numbers (Long)
793
Ordinal Numbers
670
Pascal’s Triangle
638
Prime Numbers
840
Quine
930
Roman to Arabic
439
Seven Segment
669
Sierpiński Triangle
407
φ
192
√2
211