矩阵是:
{{4, 0, 2, 0, 0, 0, 2, 0, 1},
{2, 0, 2, 0, 0, 0, 1, 0, 1},
{0, 2, 0, 0, 0, 0, 0, 1, 0},
{2, 0, 1, 0, 0, 0, 2, 0, 1},
{1, 0, 1, 0, 0, 0, 1, 0, 1},
{0, 1, 0, 0, 0, 0, 0, 1, 0},
{0, 0, 0, 2, 0, 1, 0, 0, 0},
{0, 0, 0, 1, 0, 1, 0, 0, 0},
{0, 0, 0, 0, 1, 0, 0, 0, 0}}