A179526 - OEIS

A179526

(3^k - 1)/2 appears 3^(k-1) times, k>0.

1, 4, 4, 4, 13, 13, 13, 13, 13, 13, 13, 13, 13, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121, 121

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

OFFSET

0,2

LINKS

Table of n, a(n) for n=0..62.

FORMULA

a(n+1) = 3*a(floor(n/3)) + 1; a(0) = 1.

MATHEMATICA

Table[PadRight[{}, 3^(k-1), (3^k-1)/2], {k, 5}]//Flatten (* Harvey P. Dale, May 30 2021 *)

CROSSREFS

Cf. A003462, A007448, A003817.

Sequence in context: A217771 A261321 A245517 * A098525 A141666 A102127