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A021026 Decimal expansion of 1/22. 0
0, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..98.

FORMULA

G.f.: x*(4+5*x)/(1-x^2) [From Jaume Oliver Lafont, Mar 20 2009]

a(n)=(9/2)+[(-1)^n]/2-5*[C(2*n,n) mod 2], with n>=0 [From Paolo P. Lava, Mar 31 2009]

MATHEMATICA

Join[{0}, RealDigits[1/22, 10, 120][[1]]] (* or *) CoefficientList[ Series[ x (4+5x)/(1-x^2), {x, 0, 120}], x] (* Harvey P. Dale, Apr 29 2011 *)

CROSSREFS

Cf. A010710. [From Jaume Oliver Lafont, Mar 20 2009]

Sequence in context: A242624 A068901 A010710 * A126128 A046565 A046598

Adjacent sequences:  A021023 A021024 A021025 * A021027 A021028 A021029

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 18 20:57 EST 2019. Contains 319282 sequences. (Running on oeis4.)