A021147 Decimal expansion of 1/143.

0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6, 9, 9, 3, 0, 0, 6

Offset

0,3

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (1, 0, -1, 1).

Formula

From Chai Wah Wu, Jun 21 2016: (Start)

a(n) = a(n-1) - a(n-3) + a(n-4) for n > 3.

G.f.: 3*x^2*(2 + x)/(1 - x + x^3 - x^4). (End)

Mathematica

PadLeft[First@ #, Abs@ Last@ # + Length@ First@ #] &@ RealDigits[N[1/143, 120]] (* Michael De Vlieger, Jun 21 2016 *)

Prog

(Magma) I:=[0, 0, 6, 9]; [n le 4 select I[n] else Self(n-1)- Self(n-3)+Self(n-4): n in [1..100]]; // Vincenzo Librandi, Jun 21 2016

Crossrefs

Sequence in context: A155554 A347217 A019902 * A246709 A051496 A330564

Adjacent sequences: A021144 A021145 A021146 * A021148 A021149 A021150

Keyword

nonn,cons,easy

Author

N. J. A. Sloane.

Status

approved