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Search: id:A122593
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| A122593 |
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a(n) = 2*a(n - 1) - a(n - 2) - (a(n - 2) - a(n - 1))^2 + (a(n - 2) - a(n - 3))^2. |
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+0
1
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| 1, 1, 1, 0, 0, 2, -6, -54, -2184, -4532418, -20523011025492, -421193795514716517978851412, -177404213380075544048510970681865493733941889439557930, -31472254925003374689403264185693337773848906235022202710045975235073779744728
(list; graph; listen)
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OFFSET
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1,6
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MATHEMATICA
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a[0] = 1; a[1] = 1; a[2] = 1; a[n_] := a[n] = a[n - 1] - 2*a[n - 1] + a[n - 3]- (a[n - 2] - a[n - 1])^2 + (a[n - 2] - a[n - 3])^2; Table[a[n], {n, 0, 17}]
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CROSSREFS
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Sequence in context: A156340 A085078 A152543 this_sequence A153450 A084123 A074023
Adjacent sequences: A122590 A122591 A122592 this_sequence A122594 A122595 A122596
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KEYWORD
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sign
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AUTHOR
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Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 19 2006
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Sep 21 2006
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