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Search: id:A126958
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| A126958 |
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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,4). |
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+0 2
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| 36, 24, -60, -216, -420, -624, -756, -720, -396, 360, 1716, 3864, 7020, 11424, 17340, 25056, 34884, 47160, 62244, 80520, 102396, 128304, 158700, 194064, 234900, 281736, 335124, 395640, 463884, 540480, 626076, 721344, 826980, 943704, 1072260, 1213416, 1367964
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