|
|
A024104
|
|
a(n) = 9^n - n^3.
|
|
2
|
|
|
1, 8, 73, 702, 6497, 58924, 531225, 4782626, 43046209, 387419760, 3486783401, 31381058278, 282429534753, 2541865826132, 22876792452217, 205891132091274, 1853020188847745, 16677181699661656, 150094635296993289
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
LINKS
|
|
|
FORMULA
|
G.f.: (10*x^4 + 31*x^3 + 11*x^2 - 5*x + 1)/((1-9*x)*(1-x)^4). - M. F. Hasler, Jun 14 2008
|
|
PROG
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|