A121241 - OEIS

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A121241

Change 0 to -1 in A090678.

1, 1, 1, -1, -1, 1, -1, 1, -1, 1, 1, -1, 1, -1, -1, 1, -1, 1, 1, -1, -1, 1, -1, 1, 1, -1, 1, -1, 1, -1, -1, 1, -1, 1, 1, -1, -1, 1, -1, 1, -1, 1, 1, -1, 1, -1, -1, 1, 1, -1, 1, -1, -1, 1, -1, 1, 1, -1, 1, -1, 1, -1, -1, 1, -1, 1, 1, -1, -1, 1, -1, 1, -1, 1, 1, -1, 1, -1, -1, 1, -1, 1, 1, -1, -1, 1, -1, 1, 1, -1, 1, -1, 1, -1, -1, 1, 1, -1, 1, -1, -1, 1, -1

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,1

LINKS

Table of n, a(n) for n=0..102.

FORMULA

a(n) = (-1)^(1+A088567(n)).

CROSSREFS

Sequence in context: A064179 A065357 A119665 * A122188 A158388 A162285

Adjacent sequences: A121238 A121239 A121240 * A121242 A121243 A121244

KEYWORD

sign

AUTHOR

Philippe Deléham, Aug 22 2006

STATUS

approved