A057428 - OEIS

A057428

Sign(-n): a(n) = 1 if -n > 0, = -1 if -n < 0, = 0 if n = 0.

0, -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

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OFFSET

0,1

LINKS

Table of n, a(n) for n=0..83.

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

FORMULA

G.f.: A(x) = -x/(1-x).

a(n) = -A057427(n).

Series reversion of g.f. A(x) is A(A(x)). - Nikolaos Pantelidis, Apr 13 2022

MATHEMATICA

Table[Sign[-n], {n, 0, 80}] (* Arkadiusz Wesolowski, Sep 16 2012 *)