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1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7, 8, 4, 2, 1, 5, 7
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Also the digital root of 5^n. - Cino Hilliard (hillcino368(AT)gmail.com), Dec 31 2004
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (1,0,-1,1).
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FORMULA
| a(n)=(1/30)*{14*(n mod 6)+19*[(n+1) mod 6]+29*[(n+2) mod 6]+4*[(n+3) mod 6]-[(n+4) mod 6]-11*[(n+5) mod 6]}, with n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Feb 24 2010]
a(n) = +a(n-1) -a(n-3) +a(n-4). G.f.: ( -1-4*x-2*x^2-2*x^3 ) / ( (x-1)*(1+x)*(x^2-x+1) ). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 20 2010]
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MATHEMATICA
| PowerMod[5, Range[0, 120], 9] (* From Harvey P. Dale, Mar 27 2011 *)
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CROSSREFS
| (MAGMA) [5^n mod 9: n in [0..90]]; // From Vincenzo Librandi, Feb 06 2011
Sequence in context: A135096 A153104 A155855 * A141606 A197491 A068001
Adjacent sequences: A070363 A070364 A070365 * A070367 A070368 A070369
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), May 12 2002
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