Add special bases

[xayahrainie4793]

You can add the special bases, including:

1. Balanced numeral systems, e.g. balanced ternary
2. Bijective numeral systems
3. Factorial base
4. Primorial base
5. Base -1+i and base -1-i (the twindragon base, currently your page only has base 2i)
6. Golden ratio base
7. Base e (the base with the lowest radix economy)

[Skalman]

I fully agree, these would all be valuable additions. PRs will be accepted.

[xayahrainie4793]

The balanced numeral system can support both odd bases and even bases, see https://en.wikipedia.org/wiki/List_of_numeral_systems#Signed-digit_representation

Besides factorial base and primorial base, you can also support even factorial base and odd factorial base

Besides base e, also base pi, base 3/2, base 4/3, base -3/2, base -4/3, base sqrt(2), base sqrt(3), base 2^(1/3), base -sqrt(2), base -sqrt(3), base -2^(1/3), ...

Besides golden ratio base, also supergolden ratio base, silver ratio base, plastic ratio base, ...

Also Gray code base n (https://oeis.org/A014550 for base 2, https://oeis.org/A003100 for base 10, etc.