OFFSET
5,1
REFERENCES
Nicholas S. Horne, "Analysis of Viable Network Configurations from a Combinatorial, Graphical and Algebraic Perspective." Diss. Providence College, 2004.
LINKS
T. D. Noe, Table of n, a(n) for n = 5..1000
Index entries for linear recurrences with constant coefficients, signature (11,-55,165,-330,462,-462,330,-165,55,-11,1).
FORMULA
a(n) = ((n)(n-1)(n-2)(n-3)(n-4)(n^5+5n^4+45n^3-1605n^2+9234n-17216))/3840.
G.f.: x^5*(22+580*x+715*x^2+455*x^3-1705*x^4+878*x^5)/(1-x)^11. [Colin Barker, Jun 25 2012]
MATHEMATICA
LinearRecurrence[{11, -55, 165, -330, 462, -462, 330, -165, 55, -11, 1}, {22, 822, 8547, 52892, 238392, 863289, 2660889, 7245414, 17879004, 40719679, 86762676}, 30] (* Harvey P. Dale, Sep 10 2021 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Nicholas S. Horne (nickhorne(AT)cox.net), Jul 06 2004
STATUS
approved