login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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

Table of n, a(n) for n=1..61.

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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 20 02:50 EDT 2019. Contains 323412 sequences. (Running on oeis4.)