又是一道全排列的题，之前在[31题](https://leetcode.windliang.cc/leetCode-31-Next-Permutation.html?h=permu)，[46题](https://leetcode.windliang.cc ...

ABSTRACT: In this note, we first derive an exponential generating function of the alternating run polynomials. We then deduce an explicit formula of the alternating run polynomials in terms of the ...

> - Given *n* will be between 1 and 9 inclusive. > - Given *k* will be between 1 and *n*! inclusive.

Folding mechanisms of large proteins are often complicated by the existence of kinetic traps that impede progress toward the native conformation. We have tested the role of chain connectivity in ...

Abstract: We obtain long binary sequences by concatenating the columns of (0,1)-matrices derived from permutation sequences. We then prove that these binary sequences are subsets of the Levenshtein ...