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A095694 T(n,3) diagonal of triangle in A095693. 1
1, 22, 130, 485, 1400, 3416, 7392, 14610, 26895, 46750, 77506, 123487, 190190, 284480, 414800, 591396, 826557, 1134870, 1533490, 2042425, 2684836, 3487352, 4480400 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

REFERENCES

Nicholas S. Horne, Analysis of Viable Network Configurations from a Combinatorial, Graphical and Algebraic Perspective, Diss. Providence College, 2004.

LINKS

Table of n, a(n) for n=2..24.

Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1).

FORMULA

a(n) = (n + 1) n (n - 1) (n^3 + 3 n^2 + 2 n - 16)/48. - corrected by Eric Rowland, Aug 15 2017

G.f.: -x^2*(2*x^3-3*x^2+15*x+1)/(x-1)^7. [Colin Barker, Nov 24 2012]

CROSSREFS

Sequence in context: A215626 A125247 A249302 * A233060 A299520 A003778

Adjacent sequences:  A095691 A095692 A095693 * A095695 A095696 A095697

KEYWORD

easy,nonn

AUTHOR

Nicholas S. Horne (nickhorne(AT)cox.net), Jul 06 2004

STATUS

approved

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Last modified October 13 21:59 EDT 2019. Contains 327981 sequences. (Running on oeis4.)