Having not born fruit of my own research down this rabbit hole I'm hesitant to suggest much, but the most promising road let to Vortex geometry/math (as being the proper perspective/framework within which to apply the 3-6-9). Good Luck.

add: https://awakeningtimes.com/nikola-teslas-secret-behind-the-numbers-3-6-and-9-is-finally-revealed/ this is the only bookmark I've got for that 3-6-9 Vortex math (sounds like the same thing sleepydude is referring too)

add2: I re-read that link and remember how my search ended..ultimately 'the secret', as told through this Doubling/3-6-9/VortexMath avenue isn't anything like the secrets to free energy. Rather, a fairly sobering view on duality and physical manifestation requiring the polarity of good and evil, one unable to exist without the 'geometric' balance of the other. I've yet to see or think of any application to his inventions or free energy...quite sure that's still the missing puzzle piece surrounding the whole mystery. (was it really sustainably sourced, with his shutdown coming at the hands of oil barons?...or could it have been 'hacking' the duality so to speak and he was shut down by the '9'?)

Having not born fruit of my own research down this rabbit hole I'm hesitant to suggest much, but the most promising road let to Vortex geometry/math (as being the proper perspective/framework within which to apply the 3-6-9)...then again that could have been a trap that stopped me short of anything meaningful. Good Luck.

add: https://awakeningtimes.com/nikola-teslas-secret-behind-the-numbers-3-6-and-9-is-finally-revealed/ this is the only bookmark I've got for that 3-6-9 Vortex math (sounds like the same thing sleepydude is referring too)

Having not born fruit of my own research down this rabbit hole I'm hesitant to suggest much, but the most promising road let to Vortex geometry/math (as being the proper perspective/framework within which to apply the 3-6-9)...then again that could have been a trap that stopped me short of anything meaningful. Good Luck.