  Multi-indexed Jacobi polynomials are defined by the Wronskian of four types
of eigenfunctions of a deformed P\"oschl-Teller Hamiltonian. We give a
correspondence between multi-indexed Jacobi polynomials and pairs of Maya
diagrams, and we show that any multi-indexed Jacobi polynomial is essentially
equal to some multi-indexed Jacobi polynomial of two types of eigenfunction. As
an application, we show a Wronskian-type formula of some special eigenstates of
the deformed P\"oschl-Teller Hamiltonian.
