|
|
A174532
|
|
Expansion of x^5/((1-x)*(1+x-x^5)).
|
|
0
|
|
|
0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 2, -1, 3, -1, 2, 1, -1, 5, -5, 8, -6, 6, 0, -4, 13, -18, 25, -24, 21, -7, -10, 36, -59, 81, -87, 78, -41, -17, 99, -185, 264, -304, 288, -188, 4, 261, -564, 853, -1040, 1045, -783, 220, 634, -1673, 2719
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,13
|
|
LINKS
|
|
|
FORMULA
|
a(n) = first component of v(n) = M^n v(0), where v(0)=[0,0,0,0,0,1] and
M = {{0, 1, 0, 0, 0, 0},
{0, 0, 1, 0, 0, 0},
{0, 0, 0, 1, 0, 0},
{0, 0, 0, 0, 1, 0},
{0, 0, 0, 0, 0, 1},
{-1, 1, 0, 0, 1, 0}}.
|
|
MATHEMATICA
|
M = {{0, 1, 0, 0, 0, 0},
{0, 0, 1, 0, 0, 0},
{0, 0, 0, 1, 0, 0},
{0, 0, 0, 0, 1, 0},
{0, 0, 0, 0, 0, 1},
{-1, 1, 0, 0, 1, 0}};
v[0] = Table[If[n == 6, 1, 0], {n, 1, 6}]
v[n_] := v[n] = M.v[n - 1];
b = Table[v[n][[1]], {n, 0, 50}]
CoefficientList[Series[x^5/((1-x)(1+x-x^5)), {x, 0, 60}], x] (* Harvey P. Dale, May 15 2021 *)
|
|
PROG
|
(Magma) M:=Matrix([[0, 1, 0, 0, 0, 0], [0, 0, 1, 0, 0, 0], [0, 0, 0, 1, 0, 0], [0, 0, 0, 0, 1, 0], [0, 0, 0, 0, 0, 1], [-1, 1, 0, 0, 1, 0]]); V:=Matrix([[0], [0], [0], [0], [0], [1]]); [ (M^n*V)[1][1]: n in [0..60] ]; // Klaus Brockhaus, Nov 30 2010
|
|
CROSSREFS
|
|
|
KEYWORD
|
sign,easy,less
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|