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A077860
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Expansion of 1/((1-2*x+2*x^2)*(1-x)).
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3
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1, 3, 5, 5, 1, -7, -15, -15, 1, 33, 65, 65, 1, -127, -255, -255, 1, 513, 1025, 1025, 1, -2047, -4095, -4095, 1, 8193, 16385, 16385, 1, -32767, -65535, -65535, 1, 131073, 262145, 262145, 1, -524287, -1048575, -1048575, 1, 2097153, 4194305, 4194305, 1, -8388607, -16777215, -16777215
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (3,-4,2).
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FORMULA
| a(n) = 1-A146559(n+2). a(n)= +3*a(n-1) -4*a(n-2) +2*a(n-3). - R. J. Mathar, Jan 18 2011
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MATHEMATICA
| Join[{a=1, b=3}, Table[c=2*b-2*a+1; a=b; b=c, {n, 100}]] (*From Vladimir Joseph Stephan Orlovsky, Jan 17 2011*)
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CROSSREFS
| Sequence in context: A138112 A106233 A198492 * A078063 A019944 A110551
Adjacent sequences: A077857 A077858 A077859 * A077861 A077862 A077863
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KEYWORD
| sign
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Nov 17 2002
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