In November of 1984, D. Shechtman et al. obtained the first electron micrograph of a quasicrystal. In the high resolution electron micrograph, the bright dots along any straight line have Fibonacci permutations with t...
A permutation is called a TDP permutation if i—a_i(?)j—a_j (mod n), for i≠j. It is easy to prove that a TDP permutation exists iff n is an odd number.C.Tompkins listed the number of TDP permutations for n≤11 in