program main
  implicit none
  integer*8::N,M,res=1
  integer::i
  integer*8,parameter::modulo=1000000007
  read *,N
  do i=N,1,-1
     M = 2*i
     res = MOD(res*i,modulo)
     res = MOD(res*(M-1),modulo)
  end do
  print '(i0)',res
end program main