[r-t] Parity

[Leigh Simpson]

If we write the perms on 4 in lexicographic order, the
parities follow a simple alternating pattern:

1234 +
1243 -
1324 -
1342 +
1423 +
1432 -
2134 -
2143 +
2314 +

etc...

Should this be obvious? Does it extend to higher
numbers of bells?

Leigh


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