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A122044
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a(n) = a(n - 2) - (n - 3)*a(n - 3).
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0
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0, 1, 2, 1, 1, -3, -2, -7, 13, 5, 62, -99, 17, -719, 1106, -923, 10453, -16407, 24298, -183655, 303217, -621019, 3792662, -6685359, 16834061, -90123923, 170597318, -494141387, 2423695393, -4929671655, 15765512842, -72793142659, 158725990837, -545758527919, 2415313413266
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