n = gets.to_i
if n < 3
    puts 0
    exit
end
t = Array.new(n)
n.times{|i|
    t[i] = Array.new(i+1)
    }
t[0][0] = 1
1.upto(n-1){|i|
    if i % 2 == 1
        t[i][0] = 0
        1.upto(i){|j|
            t[i][j] = t[i][j-1] + t[i-1][j-1]
            }
    else
        t[i][i] = 0
        (i-1).downto(0){|j|
            t[i][j] = t[i][j+1] + t[i-1][j]
            }
    end
    }
p t[n-1].inject(&:+) * 2 % 1000000007