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A063747 Sign of n-th coefficient of power series for 1/Gamma(1-x) where Gamma is the Gamma function. 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, -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..99.

EXAMPLE

1/Gamma(1-x) = 1 - gamma*x - 0.6558...*x^2 + 0.042...*x^3 + 0.1665...*x^4 + 0.0421...*x^5 - 0.0096..*x^6 +.... hence sequence begins 1,-1,-1,1,1,1,-1,

PROG

(PARI) a(n)=sign(polcoeff(1/(gamma(1-x)+O(x^(n+1))), n))

CROSSREFS

Sequence in context: * A077008 A158387 A265643 A008836 A087960 A164660

Adjacent sequences:  A063744 A063745 A063746 * A063748 A063749 A063750

KEYWORD

sign

AUTHOR

Benoit Cloitre, Jan 16 2004

STATUS

approved

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Last modified October 20 22:23 EDT 2018. Contains 316404 sequences. (Running on oeis4.)