|
|
A168054
|
|
Expansion of (1-8x^2-24x^3)/((1-2x)^2*(1+2x+4x^2)).
|
|
3
|
|
|
1, 2, -4, -24, -48, -160, -448, -896, -2304, -5632, -11264, -26624, -61440, -122880, -278528, -622592, -1245184, -2752512, -6029312, -12058624, -26214400, -56623104, -113246208, -243269632, -520093696, -1040187392, -2214592512
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
|
|
MATHEMATICA
|
LinearRecurrence[{2, 0, 8, -16}, {1, 2, -4, -24}, 100] (* G. C. Greubel, Jul 07 2016 *)
CoefficientList[Series[(1 - 8 x^2 - 24 x^3) / ((1 - 2 x)^2 (1 + 2 x + 4 x^2)), {x, 0, 30}], x] (* Vincenzo Librandi, Jul 08 2016 *)
|
|
PROG
|
(Magma) I:=[1, 2, -4, -24]; [n le 4 select I[n] else 2*Self(n-1)+8*Self(n-3)-16*Self(n-4): n in [1..30]]; // Vincenzo Librandi, Jul 08 2016
|
|
CROSSREFS
|
|
|
KEYWORD
|
easy,sign
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|