An actual inverted "triple paradiddle" or paradiddle-diddle more literally, is not a paradiddle-diddle off the left hand. An inverted paradiddle-diddle would actually be the inverse of its regular form:
Para-diddle-diddle in sixlet form:
RLRRLL RLRRLL RLRRLL RLRRLL
LRLLRR LRLLRR LRLLRR LRLLRR
Inverted Paradiddle-diddle:
LLRRLR LLRRLR LLRRLR LLRRLR
RRLLRL RRLLRL RRLLRL RRLLRL
Often times the first note of a paradiddle-diddle is accented.