the tetentri (also called duprimibolplex) is equal to s(3,3,3,3) using strong array notation by Hyp cos. It is equal to 3→3→3→3→3 in chained arrow notation. This number is also equal to s(3,3,1,4), s(3,1,1,5), s(3,3,1,1,2), s(3,1,1,2,2), s(3,1,1,1,1,2), or s(3,3{2}2).