# 2016.2.13
import time
#N = input()
N = 1000
alpha = [0 for i in range(0, N)]
beta = [0 for i in range(0, N)]
start = time.time()
if N < 3:
    print "0"
else:
    flag = "alpha"
    alpha[0] = 4
    alpha[1] = 2
    beta[0] = 4
    beta[1] = 2
    for i in xrange(3, N):
        if flag == "alpha":
            for j in xrange(0, min(i-1, N/2)):
                tmp = alpha[j]
                beta[j] = 2 * tmp
            for j in xrange(0, min(i-1, N/2)):
                tmp = alpha[j]
                beta[j-1] += tmp * j
                beta[j+1] += tmp * (i - 1 - j)
            flag = "beta"
        else:
            for j in xrange(0, min(i-1, N/2)):
                tmp = beta[j]
                alpha[j] = 2 * tmp
            for j in xrange(0, min(i-1, N/2)):
                tmp = beta[j]
                alpha[j-1] += tmp * j
                alpha[j+1] += tmp * (i - 1 - j)
            flag = "alpha"
    if flag == "alpha":
        print alpha[0] % 1000000007
    else:
        print beta[0] % 1000000007
#print int((time.time() - start) * 1000),  "ms"