Abundant Numbers
729
Abundant Numbers (Long)
799
ASCII Table
568
Catalan Numbers
839
Christmas Trees
617
Collatz
734
Divisors
933
Emirp Numbers
871
Emirp Numbers (Long)
566
Evil Numbers
853
Evil Numbers (Long)
832
Fibonacci
934
Fizz Buzz
891
Foo Fizz Buzz Bar
783
Fractions
620
Happy Numbers
589
Happy Numbers (Long)
731
Inventory Sequence
756
Leap Years
847
Leyland Numbers
816
Look and Say
591
Lucky Numbers
673
Niven Numbers
785
Niven Numbers (Long)
870
Odious Numbers
851
Odious Numbers (Long)
847
Ordinal Numbers
579
Pascal’s Triangle
841
Pernicious Numbers
766
Pernicious Numbers (Long)
798
Poker
361
Prime Numbers
835
Prime Numbers (Long)
891
Quine
946
Recamán
840
Repeating Decimals
336
Roman to Arabic
532
Smith Numbers
562
Time Distance
383
Tongue-twisters
416
Vampire Numbers
554
Van Eck Sequence
787
π
403
τ
394
φ
682
√2
704
𝑒
698