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A008587
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Multiples of 5.
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57
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0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200, 205, 210, 215, 220, 225, 230, 235, 240, 245, 250, 255, 260, 265, 270, 275
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| 1/31 = .0322580645..., = .5^5 + .5^10 + .5^15 + ... [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Mar 14 2009]
Complement of A047201; A079998(a(n))=1; A011558(a(n))=0. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 30 2009]
The y-intercept of a line perpendicular to y=mx,where m is the slope a/b and in this case a=2 and b=1, is a^2+b^2 or 5, the first value of the list given. The remaining value are multiples of the first number of the list. [From larry zimmermann (larry.j.zimmermann(AT)lonestar.edu), Aug 21 2010]
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LINKS
| Index entries for sequences related to linear recurrences with constant coefficients, signature (2,-1).
Tanya Khovanova, Recursive Sequences
INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 317
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FORMULA
| O.g.f.: 5x/(1-x)^2. a(n)=A008706(n), n>0. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 26 2008
a(n)=Sum_k>=0 {A030308(n,k)*A020714(k)}. - From DELEHAM Philippe, Oct 17 2011.
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MATHEMATICA
| Range[0, 500, 5] (* From Vladimir Joseph Stephan Orlovsky (4vladimir(AT)gmail.com), May 26 2011 *)
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CROSSREFS
| Cf. index to numbers of the form n*(d*n+10-d)/2 in A140090.
Sequence in context: A063284 A092454 A008706 * A172336 A140233 A172328
Adjacent sequences: A008584 A008585 A008586 * A008588 A008589 A008590
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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