OFFSET
1,1
COMMENTS
The Hosoya-Wiener polynomial of TA(n) is n(10+12t+18t^2+12t^3+3t^4)+(1+3t+3t^2+3t^3)^2*(t^{3n+1}-nt^4+nt-1)/(t^3-1)^2.
LINKS
G. H. Fath-Tabar, A. Azad, and N. Elahinezhad, Some topological indices of tetrameric 1,3-adamantane, Iranian J. Math. Chemistry, 1, No. 1, 2010, 111-118.
Index entries for linear recurrences with constant coefficients, signature (4,-6,4,-1).
FORMULA
a(n) = 50n^3 + 80n^2 - 34n.
G.f.: -4*x*(16*x^2-67*x-24)/(x-1)^4. [Colin Barker, Oct 31 2012]
MAPLE
seq(50*n^3+80*n^2-34*n, n=1..30);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Emeric Deutsch, Oct 26 2012
STATUS
approved