A095695 - OEIS

A095695

T(n,4) diagonal of triangle in A095693.

6, 130, 1005, 4830, 17465, 52101, 135135, 314985, 674685, 1349205, 2548546, 4587765, 7925190, 13210190, 21341970, 33540966, 51434520, 77158620, 113477595, 163923760, 232959111, 326161275, 450436025

(list; graph; refs; listen; history; text; internal format)

OFFSET

4,1

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=4..26.

Index entries for linear recurrences with constant coefficients, signature (9,-36,84,-126,126,-84,36,-9,1).

FORMULA

a(n) = n*(n-1)*(n-2)*(n-3)*(n^4+2*n^3-13*n^2-54*n+136)/384.

G.f.: -x^4*(11*x^4-39*x^3+51*x^2+76*x+6)/(x-1)^9. - Colin Barker, Nov 24 2012

CROSSREFS

Sequence in context: A012638 A338709 A318528 * A156475 A000907 A188718

Adjacent sequences: A095692 A095693 A095694 * A095696 A095697 A095698

KEYWORD

easy,nonn

AUTHOR

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

STATUS

approved