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128, are {02,1,3} from [3,3,4] generators {0,1,2,3}. And [(3,3)^?,4] ? , order 64, has generators {02,1021,3}. As well, [3^?,4,3^?] ? [(3,3)^?,4].

Also related [3^1,1,1] = [3,3,4,1⁺] has trionic subgroups: [3^1,1,1]^? = [(3,3)^?,4,1⁺], order 64, and 1=[3^1,1,1]^? = [(3,3)^?,4,1⁺] ? 4,2⁺,4⁺, order 32.

Central inversion

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