
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
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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)/(1x).  Bruno Berselli, Sep 09 2011


PROG

(PARI) a(n)=if(n>2, 15, 3*n3) \\ Charles R Greathouse IV, Oct 07 2015


CROSSREFS

Cf. A018889, A010854.
Sequence in context: A296842 A279925 A279534 * A096672 A344565 A289374
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

