A172430 Period length 10: repeat [2, 1, 6, 7, 0, 3, 4, 9, 8, 5].

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

Offset

0,1

Comments

Also the decimal expansion of the rational number 240781665 / 1111111111 .

Links

Table of n, a(n) for n=0..105.

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

Formula

a(n) = A172285(n+1) mod 10.

G.f.: (2+x+6*x^2+7*x^3+3*x^5+4*x^6+9*x^7+8*x^8+5*x^9)/ ((1-x) * (1+x) * (x^4+x^3+x^2 +x+1)* (x^4-x^3+x^2-x+1)).

a(3*n) = A172423(n+2).

Mathematica

PadRight[{}, 100, {2, 1, 6, 7, 0, 3, 4, 9, 8, 5}] (* Paolo Xausa, May 22 2026 *)

Crossrefs

Cf. A172423.

Sequence in context: A019082 A345323 A052636 * A325139 A084312 A066752

Adjacent sequences: A172427 A172428 A172429 * A172431 A172432 A172433

Keyword

nonn,easy

Author

Paul Curtz, Feb 02 2010

Extensions

Edited by R. J. Mathar, Feb 11 2010

Status

approved