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A024190 [ (2nd elementary symmetric function of 3,4,...,n+3)/(3+4+...+n+3) ]. 0
1, 3, 6, 9, 13, 17, 22, 27, 33, 39, 46, 53, 60, 69, 77, 86, 96, 106, 117, 128, 140, 152, 165, 178, 191, 206, 220, 235, 251, 267, 284, 301, 319, 337, 356, 375, 394, 415, 435, 456, 478, 500, 523, 546 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..44.

FORMULA

Empirical g.f.: -x*(x^12 -2*x^11 +x^10 -2*x^9 +2*x^8 +2*x^6 -x^5 -x^3 +x^2 +x +1) / ((x -1)^3*(x^2 +1)*(x^2 +x +1)*(x^4 -x^2 +1)). - Colin Barker, Aug 16 2014

CROSSREFS

Sequence in context: A002815 A109512 A025205 * A004116 A004129 A219646

Adjacent sequences:  A024187 A024188 A024189 * A024191 A024192 A024193

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified December 10 20:48 EST 2017. Contains 295856 sequences.