A Number System for the Permutations CACM March, 1970 Pager, D. permutation, ordering, number, number system, p-number, combinatorial 4.49 5.39 CA700311 JB February 13, 1978 3:42 PM 2087 4 2087 2189 4 2087 3188 4 2087 1594 5 2087 2087 5 2087 2087 5 2087 2087 5 2087 2189 5 2087 1594 6 2087 2087 6 2087 3191 6 2087 521 6 2087