A147674 Period 9: repeat 81,27,9,27,27,9,27,81,9.

81, 27, 9, 27, 27, 9, 27, 81, 9, 81, 27, 9, 27, 27, 9, 27, 81, 9, 81, 27, 9, 27, 27, 9, 27, 81, 9, 81, 27, 9, 27, 27, 9, 27, 81, 9, 81, 27, 9, 27, 27, 9, 27, 81, 9, 81, 27, 9, 27, 27, 9, 27, 81, 9, 81, 27, 9, 27, 27, 9, 27, 81, 9, 81, 27, 9, 27, 27, 9, 27, 81, 9

Offset

0,1

Links

Table of n, a(n) for n=0..71.

Index entries for periodic sequences, period 9.

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

Formula

a(n) = 9*A154629(n).

a(n) = a(n-9).

Mathematica

PadRight[{}, 120, {81, 27, 9, 27, 27, 9, 27, 81, 9}] (* Harvey P. Dale, Jun 27 2020 *)

Prog

(PARI) a(n)=193133139\10^(n%9)%10*9 \\ Charles R Greathouse IV, Jun 03 2026
(PARI) a(n)=9*[9, 3, 1, 3, 3, 1, 3, 9, 1][n%9+1] \\ Charles R Greathouse IV, Jun 03 2026

Crossrefs

Cf. A154629.

Sequence in context: A214104 A175241 A178373 * A397698 A033401 A143756

Adjacent sequences: A147671 A147672 A147673 * A147675 A147676 A147677

Keyword

nonn,less,easy

Author

Paul Curtz, Nov 10 2008

Status

approved