A021258 Decimal expansion of 1/254.

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

Offset

0,3

Comments

After the first zero, periodic with period 42: repeat [0, 3, 9, 3, 7, 0, 0, 7, 8, 7, 4, 0, 1, 5, 7, 4, 8, 0, 3, 1, 4, 9, 6, 0, 6, 2, 9, 9, 2, 1, 2, 5, 9, 8, 4, 2, 5, 1, 9, 6, 8, 5]. - Wesley Ivan Hurt, Dec 29 2016

Links

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

Formula

From Chai Wah Wu, Dec 29 2016: (Start)

a(n) = a(n-1) - a(n-21) + a(n-22) for n > 22.

G.f.: x^2*(-5*x^20 - 3*x^19 + 2*x^18 - 3*x^17 + 8*x^16 - 4*x^15 + 3*x^14 - 2*x^13 - 4*x^12 - x^11 + 4*x^10 + 3*x^9 + x^8 - x^7 - 7*x^6 + 7*x^4 - 4*x^3 + 6*x^2 - 6*x - 3)/(x^22 - x^21 + x - 1). (End)

Crossrefs

Sequence in context: A195292 A197572 A224233 * A200607 A099319 A231828

Adjacent sequences: A021255 A021256 A021257 * A021259 A021260 A021261

Keyword

nonn,cons

Author

N. J. A. Sloane

Status

approved