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A138188 Expansion of (1-2x-2x^2-x^3)/(1+x+x^2-x^3-x^4-x^5). 2
1, -3, 0, 3, -5, 0, 5, -7, 0, 7, -9, 0, 9, -11, 0, 11, -13, 0, 13, -15, 0, 15, -17, 0, 17, -19, 0, 19, -21, 0, 21, -23, 0, 23, -25, 0, 25, -27, 0, 27, -29, 0, 29, -31, 0, 31, -33, 0, 33, -35, 0, 35, -37, 0, 37, -39, 0, 39, -41, 0, 41 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Partial sums of A138187. Partial sums are A138189.

LINKS

Table of n, a(n) for n=0..60.

Index entries for linear recurrences with constant coefficients, signature (-1,-1,1,1,1).

CROSSREFS

Sequence in context: A222794 A127749 A198431 * A229704 A014715 A131656

Adjacent sequences:  A138185 A138186 A138187 * A138189 A138190 A138191

KEYWORD

easy,sign

AUTHOR

Paul Barry, Mar 04 2008

STATUS

approved

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Last modified April 22 18:24 EDT 2021. Contains 343177 sequences. (Running on oeis4.)