Nice function to get a random number in C

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void init_rand(unsigned long int x)
{
	int i;
	Q[0] = x;
	Q[1] = x + PHI;
	Q[2] = x + PHI + PHI;
	for (i = 3; i < 4096; i++){ Q[i] = Q[i - 3] ^ Q[i - 2] ^ PHI ^ i; }
}