...that provide around 1 million signatures per key. That seems more
than sufficient for human usage.
Note that generating the key takes 16 times longer than for already
present algorithms (that have H=16). On my computer, it is around 4
minutes for fmtseq128N20 and 16 minutes for fmtseq256N20.
It's quite rational to have such algorithm. 256-bit security is usually
an overkill, and this has two times smaller signatures (around 9.5kB) is
_so_ much faster. Use it.
