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A123958 Expansion of x^3 / ( 1+2*x^2+2*x^3 ). 0
0, 0, 1, 0, -2, -2, 4, 8, -4, -24, -8, 56, 64, -96, -240, 64, 672, 352, -1472, -2048, 2240, 7040, -384, -18560, -13312, 37888, 63744, -49152, -203264, -29184, 504832, 464896, -951296, -1939456, 972800, 5781504, 1933312, -13508608, -15429632, 23150592, 57876480, -15441920, -162054144, -84869120 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Apart from the offset, the same as A077968.

LINKS

Table of n, a(n) for n=1..44.

Index entries for linear recurrences with constant coefficients, signature (0,-2,-2).

MATHEMATICA

M = {{0, 1, 0}, {0, 0, 1}, {-2, -2, 0}}; v[1] = {0, 0, 1}; v[n_] := v[n] = M.v[n - 1]; a1 = Table[v[n][[1]], {n, 1, 50}]

CROSSREFS

Sequence in context: A032522 A077964 A077968 * A048572 A121173 A160159

Adjacent sequences:  A123955 A123956 A123957 * A123959 A123960 A123961

KEYWORD

sign,easy

AUTHOR

Roger L. Bagula and Gary W. Adamson, Oct 27 2006

STATUS

approved

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Last modified May 25 19:13 EDT 2019. Contains 323576 sequences. (Running on oeis4.)