#include using namespace std; typedef long long LL; typedef vector V; typedef vector VV; typedef vector VVV; typedef vector VVVV; const LL MOD=1e9+7; int main() { int N; cin >> N; VVVV dp(N+2,VVV(N+10,VV(2,V(2,0)))); VVVV cnt(N+2,VVV(N+10,VV(2,V(2,0)))); dp[1][0][0][0] = 1; dp[2][0][0][0] = 2; for(int i = 2; i p(i+1);iota(p.begin(),p.end(),1);do{int a=0,b=0,c=0;for(int j = 0; j < i; j++){if(p[j]==i+1&&p[j+1]==i-1)a++;if(p[j]==i-1&&p[j+1]==i+1)a++;if(p[j]==i-2&&p[j+1]==i)b++; if(p[j]==i&&p[j+1]==i-2)b++; if(abs(p[j]-p[j+1])==2)c++;}cnt[i+1][c][b][a]++;}while(next_permutation(p.begin(),p.end())); for(int j = 0; j <= N; j++) for(int k = 0; k < 2; k++) for(int l = 0; l < 2; l++){ dp[i + 1][j][k][l] %=MOD; //printf("dp[%d][%d][%d][%d]=%lld ",i+1,j,k,l,dp[i+1][j][k][l]); //printf("cnt[%d][%d][%d][%d]=%lld\n",i+1,j,k,l,cnt[i+1][j][k][l]); } } cout << dp[N][0][0][0] << endl; return 0; }