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A025194
a(n) = [ 3rd elementary symmetric function of {sqrt(k)} ], k = 1,2,...,n.
2
2, 13, 44, 112, 239, 457, 801, 1320, 2066, 3103, 4504, 6354, 8744, 11779, 15576, 20260, 25971, 32861, 41093, 50844, 62304, 75678, 91183, 109050, 129526, 152874, 179367, 209300, 242978, 280725, 322881, 369801, 421858, 479441, 542957, 612830, 689502
OFFSET
3,1
MAPLE
SymmPolyn := proc(L::list, n::integer)
local c, a, sel;
a :=0 ;
sel := combinat[choose](nops(L), n) ;
for c in sel do
a := a+mul(L[e], e=c) ;
end do:
a;
end proc:
A025194 := proc(n)
[seq(sqrt(k), k=1..n)] ;
SymmPolyn(%, 3) ;
floor(%) ;
end proc: # R. J. Mathar, Sep 23 2016
CROSSREFS
Sequence in context: A296807 A366310 A308731 * A084156 A002534 A212501
KEYWORD
nonn
EXTENSIONS
a(13) corrected by Sean A. Irvine, Aug 16 2019
STATUS
approved