A021285 Decimal expansion of 1/281.

0, 0, 3, 5, 5, 8, 7, 1, 8, 8, 6, 1, 2, 0, 9, 9, 6, 4, 4, 1, 2, 8, 1, 1, 3, 8, 7, 9, 0, 0, 3, 5, 5, 8, 7, 1, 8, 8, 6, 1, 2, 0, 9, 9, 6, 4, 4, 1, 2, 8, 1, 1, 3, 8, 7, 9, 0, 0, 3, 5, 5, 8, 7, 1, 8, 8, 6, 1, 2, 0, 9, 9, 6, 4, 4, 1, 2, 8, 1, 1, 3, 8, 7, 9, 0, 0, 3, 5, 5, 8, 7, 1, 8, 8, 6, 1, 2, 0, 9

Offset

0,3

Links

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

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

Formula

From Chai Wah Wu, Sep 04 2025: (Start)

a(n) = a(n-1) - a(n-14) + a(n-15) for n > 14.

G.f.: x^2*(-9*x^12 + 2*x^11 - x^10 + 5*x^9 + 2*x^8 - 7*x^6 + 6*x^5 + x^4 - 3*x^3 - 2*x - 3)/(x^15 - x^14 + x - 1). (End)

Mathematica

Join[{0, 0}, RealDigits[1/281, 10, 120][[1]]] (* or *) PadRight[{}, 120, {0, 0, 3, 5, 5, 8, 7, 1, 8, 8, 6, 1, 2, 0, 9, 9, 6, 4, 4, 1, 2, 8, 1, 1, 3, 8, 7, 9}] (* Harvey P. Dale, Dec 08 2019 *)

Crossrefs

Sequence in context: A158331 A197286 A019632 * A138575 A380409 A263209

Adjacent sequences: A021282 A021283 A021284 * A021286 A021287 A021288

Keyword

nonn,cons

Author

N. J. A. Sloane

Status

approved