Name: Anonymous 2020-06-04 1:52
Literally I finished the job in one day using node and electron and the result is a modern, cross-platform app. C++ boomers BTFO.
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Frozenhttps://textboard.org/prog/100#t100p16
~/Code>time ./hofseq 2000000000https://textboard.org/prog/100#t100p18
2000083969706219361
real 0m6.980s
user 0m6.978s
sys 0m0.000s
Here is confirmation of your R(2*10^9) value
and here is the runtime in my implementation, just over 30 milliseconds
$ python3 -m timeit -s 'import flake.hofs as mod' 'mod.work_seq (2000000000)'
10 loops, best of 3: 30.5 msec per loop
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