Java (OpenJDK 8), 200 bytes
n->{char[][]s=new char[n][4+2*n];for(int i=0,j=2*n;i<n;s[i][(3+j)/2-i]=47,s[i][2+n+i]=92,s[i][0]=i<1|i>n-2?40:'|',s[i][3+j]=i<1|i>n-2?41:'|',System.out.println("".valueOf(s[i++]).replace('\0',' ')));}
Roberto Graham
- 1.3k
- 7
- 10