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A060691 Expansion of AGM(1,1-8x) (where AGM denotes the arithmetic-geometric mean). +0
2
1, -4, -4, -16, -84, -496, -3120, -20416, -137300, -942384, -6572336, -46432960, -331580272, -2389352256, -17351364160, -126851634432, -932823545428, -6895102385072, -51199649648048, -381738099675840, -2856639909232112 (list; graph; listen)
OFFSET

0,2

FORMULA

G.f.: AGM(1, 1-8x).

PROGRAM

(PARI) a(n)=if(n<0, 0, polcoeff(agm(1, 1-8*x+x*O(x^n)), n))

CROSSREFS

Sequence in context: A107382 A038788 A010099 this_sequence A075225 A091541 A094354

Adjacent sequences: A060688 A060689 A060690 this_sequence A060692 A060693 A060694

KEYWORD

sign

AUTHOR

Roland Bacher (Roland.Bacher(AT)ujf-grenoble.fr), Apr 20 2001

EXTENSIONS

Edited by Michael Somos, Jul 19, 2002

page 1

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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