1 * 1 =  - 1, 2 * 2 = - 4, 3 * 3 = - 9, 4 * 4 = - 16, 5 * 5 = - 25, 6 * 6 = - 36, 7 * 7 = - 49, 8 * 8 = - 64, 9 * 9 = - 81, 10 * 10 = - 100, 11 * 11 = - 121, 12 * 12 = - 144,

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