How about a long-ish memorable phrase and password, encrypted with scrypt? Hit the output with base64 and use the first N characters of the, possibly hashed, re

How about a long-ish memorable phrase and password, encrypted with scrypt? Hit the output with base64 and use the first N characters of the, possibly hashed, result (haven't tried it, so I'm not sure what stage of the output would be most memorable). The results should be about as easy to remember as a routing number + bank account, which is something my friends and I all do.