A021249 - OEIS

A021249

Decimal expansion of 1/245.

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

(list; constant; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

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

FORMULA

Equals 10*A021053-1/5 . [From R. J. Mathar, Oct 25 2008]

From Chai Wah Wu, Jul 13 2016: (Start)

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

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

MATHEMATICA

PadLeft[First@ #, Length@ First@ # + Abs@ Last@ #] &@ RealDigits[N[1/245, 120]] (* Michael De Vlieger, Jul 13 2016 *)

PROG

(PARI) 1/245. \\ Altug Alkan, Jul 13 2016

CROSSREFS

Sequence in context: A304440 A073467 A288096 * A010638 A123961 A020763

Adjacent sequences: A021246 A021247 A021248 * A021250 A021251 A021252

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane.

STATUS

approved