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 A181404 Total number of positive integers below 10^n requiring 8 positive cubes in their representation as sum of cubes. 9
 0, 3, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS A061439(n) + A181375(n) + A181377(n) + A181379(n) + A181381(n) + A181400(n) + A181402(n) + a(n) + A130130(n) = A002283(n) Also continued fraction expansion of (9+sqrt(229))/74. [Bruno Berselli, Sep 09 2011] LINKS Weisstein, Eric W.: Waring's Problem Index entries for linear recurrences with constant coefficients, signature (1). FORMULA a(n) = 15 for n > 2. - Charles R Greathouse IV, Sep 09 2011 G.f.: 3*x*(1+4*x)/(1-x). - Bruno Berselli, Sep 09 2011 PROG (PARI) a(n)=if(n>2, 15, 3*n-3) \\ Charles R Greathouse IV, Oct 07 2015 CROSSREFS Cf. A018889, A010854. Sequence in context: A296842 A279925 A279534 * A096672 A289374 A289103 Adjacent sequences:  A181401 A181402 A181403 * A181405 A181406 A181407 KEYWORD nonn,easy AUTHOR Martin Renner, Jan 28 2011 EXTENSIONS a(5)-a(7) from Lars Blomberg, May 04 2011 STATUS approved

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Last modified March 20 20:14 EDT 2019. Contains 321352 sequences. (Running on oeis4.)