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-180, 70, 320, 570, 820, 1070, 1320, 1570, 1820, 2070, 2320, 2570, 2820, 3070, 3320, 3570, 3820, 4070, 4320, 4570, 4820, 5070, 5320, 5570, 5820, 6070, 6320, 6570, 6820, 7070, 7320, 7570, 7820, 8070, 8320, 8570, 8820, 9070, 9320, 9570, 9820, 10070, 10320
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| The identity (1250n^2-1800n+649)^2-(25n^2-36n+13)*(250n-180)^2=1 can be written as A154358(n)^2-A154355(n)*a(n)^2=1. See also the third comment in A154357.
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (2,-1).
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FORMULA
| G.f.: -10*(18-43*x)/(1-x)^2. - Bruno Berselli, Dec 13 2011
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CROSSREFS
| Cf. A154361, A154359, A154358, A154357, A154355.
Sequence in context: A036203 A053325 A119542 * A117551 A068545 A068403
Adjacent sequences: A154357 A154358 A154359 * A154361 A154362 A154363
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KEYWORD
| sign,easy
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AUTHOR
| Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 08 2009
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EXTENSIONS
| Offset changed and Librandi's comment rewritten from Bruno Berselli, Dec 13 2011
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