1105The repeated snake rearrangement
Pick up the card along the columns, first from top to bottom, then from
bottom to top, and alternately. Rearrange in the standard order. This is
the permutationσ=σm,n
1 2 3 45 6 7 89 10 11 1213 14 15 16The cycle structure after one more application:1 2 3 45 6 7 89 10 11 1213 14 15 16