A021081 Decimal expansion of 1/77.

0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2, 9, 8, 7, 0, 1, 2

Offset

0,3

Links

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

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

Formula

From Chai Wah Wu, Jun 05 2016: (Start)

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

G.f.: x*(1 + x + 7*x^2)/(1 - x + x^3 - x^4). (End)

Crossrefs

Sequence in context: A274195 A021975 A192599 * A018799 A076219 A077601

Adjacent sequences: A021078 A021079 A021080 * A021082 A021083 A021084

Keyword

nonn,easy,cons

Author

N. J. A. Sloane.

Status

approved