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A126935
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Define an array by d(m, 0) = 1, d(m, 1) = m; d(m, k) = (m - k + 1) d(m+1, k-1) - (k-1) (m+1) d(m+2, k-2). Sequence gives d(n,3).
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1
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0, -12, -24, -30, -24, 0, 48, 126, 240, 396, 600, 858, 1176, 1560, 2016, 2550, 3168, 3876, 4680, 5586, 6600, 7728, 8976, 10350, 11856, 13500, 15288, 17226, 19320, 21576, 24000, 26598, 29376, 32340, 35496, 38850, 42408, 46176, 50160, 54366, 58800, 63468, 68376, 73530
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