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A008587
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Multiples of 5: a(n) = 5 * n.
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99
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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;
text;
internal format)
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OFFSET
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0,2
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COMMENTS
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1/31 = 0.0322580645... = (1/2)^5 + (1/2)^10 + (1/2)^15 +... -Gary W. Adamson,Mar 14 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. -Larry J Zimmermann,Aug 21 2010
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LINKS
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FORMULA
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O.g.f.: 5x/(1-x)^2.
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MATHEMATICA
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PROG
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(Maxima) makelist(5*n, n, 0, 20); /*Martin Ettl,Dec 17 2012 */
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CROSSREFS
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Cf. index to numbers of the form n*(d*n+10-d)/2 inA140090.
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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