Table 1.

The state space of a system with n molecular species x _j and N microstates s _i. n _i(x _j) denotes the copy number of molecular species x _j at state s _i

Copy number		Molecule species
		x 1	x 2	…	x n
States	s 1	n 1(x 1)	n 1(x 2)	…	n 1(x n)
	s 2	n 2(x 1)	n 2(x 2)	…	n 2(x n)
	…	…	…	…	…
	s N	n N(x 1)	n N(x 2)	…	n N(x n)