OFFSET
0,1
LINKS
M. Mirzargar, PI, Szeged and edge Szeged polynomials of a dendrimer nanostar, MATCH, Commun. Math. Comput. Chem. 62, 2009, 363-370.
FORMULA
a(n) = 116340 - 2^n*3768423/2+4^n*(455625*n^2 - 2112075*n/2 + 3582801/2).
G.f.: 3*(7843 +252978*x + 651387*x^2 +134852*x^3)/((1-x)*(1-2*x)*(1-4*x)^3).
MAPLE
a := proc (n) options operator, arrow: 116340-(3768423/2)*2^n+4^n*(455625*n^2-(2112075/2)*n+3582801/2) end proc: seq(a(n), n = 0 .. 20);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Emeric Deutsch, Jul 13 2013
STATUS
approved