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A086796 a(n) is the number of terms in the expansion of (x+y+z)*(x^2+y^2+z^2)*(x^3+y^3+z^3)*...*(x^n+y^n+z^n). 5
3, 9, 24, 60, 130, 247, 429, 697, 1075, 1590, 2272, 3154, 4272, 5665, 7375, 9447, 11929, 14872, 18330, 22360, 27022, 32379, 38497, 45445, 53295, 62122, 72004, 83022, 95260, 108805, 123747, 140179 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MAPLE
A086796 := proc(n)
mul( x^i+y^i+z^i, i=1..n) ;
expand(%) ;
nops([coeffs(%)]) ;
end proc: # R. J. Mathar, Sep 15 2012
MATHEMATICA
Table[Length[Expand[Times@@Table[Total[{x, y, z}^n], {n, m}]]], {m, 40}] (* Harvey P. Dale, Sep 04 2018 *)
CROSSREFS
Cf. A000124.
Sequence in context: A109175 A120539 A357718 * A034330 A264685 A320731
KEYWORD
nonn
AUTHOR
Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 05 2003
STATUS
approved

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Last modified June 13 17:32 EDT 2024. Contains 373391 sequences. (Running on oeis4.)