|
|
A192418
|
|
Molecular topological indices of the complete bipartite graphs K_{n,n}.
|
|
0
|
|
|
4, 48, 180, 448, 900, 1584, 2548, 3840, 5508, 7600, 10164, 13248, 16900, 21168, 26100, 31744, 38148, 45360, 53428, 62400, 72324, 83248, 95220, 108288, 122500, 137904, 154548, 172480, 191748, 212400
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
FORMULA
|
a(n) = 4*n^2*(2*n-1).
G.f.: 4*x*(3*x^2+8*x+1)/(x-1)^4. - Colin Barker, Nov 04 2012
|
|
MATHEMATICA
|
Table[4n^2(2n-1), {n, 30}] (* or *) LinearRecurrence[{4, -6, 4, -1}, {4, 48, 180, 448}, 30] (* Harvey P. Dale, Apr 08 2018 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|