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 A064195 a(n) = 3*(n-2)*(n-3)*(3*n^2-9)*(3*n^2-9*n-5)/2. 1

%I

%S 0,0,819,14850,87318,327060,947025,2314494,5011020,9902088,18216495,

%T 31635450,52391394,83376540,128261133,191621430,279077400,397440144,

%U 554869035,761038578,1027314990,1366942500,1795239369,2329803630

%N a(n) = 3*(n-2)*(n-3)*(3*n^2-9)*(3*n^2-9*n-5)/2.

%D L. Berzolari, Allgemeine Theorie der Höheren Ebenen Algebraischen Kurven, Encyclopädie der Mathematischen Wissenschaften mit Einschluss ihrer Anwendungen. Band III_2. Heft 3, Leipzig: B. G. Teubner, 1906. p. 341.

%H Harry J. Smith, <a href="/A064195/b064195.txt">Table of n, a(n) for n = 2..1000</a>

%F G.f.: 9*x^4*(91+1013*x+63*x^2-109*x^3+22*x^4)/(1-x)^7. - _Colin Barker_, Feb 28 2012

%o (PARI) { for (n=2, 1000, a=3*(n - 2)*(n - 3)*(3*n^2 - 9)*(3*n^2 - 9*n - 5)/2; write("b064195.txt", n, " ", a) ) } \\ _Harry J. Smith_, Sep 09 2009

%K nonn,easy

%O 2,3

%A Antreas P. Hatzipolakis (xpolakis(AT)otenet.gr), Sep 22 2001

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Last modified August 14 03:14 EDT 2022. Contains 356109 sequences. (Running on oeis4.)