A001738 a(n) = n^2 written in base 3.

0, 1, 11, 100, 121, 221, 1100, 1211, 2101, 10000, 10201, 11111, 12100, 20021, 21021, 22100, 100111, 101201, 110000, 111101, 112211, 121100, 122221, 201121, 210100, 212011, 221001, 1000000, 1002001, 1011011, 1020100, 1022121, 1101221, 1111100, 1120211

Offset: 0

Author

N. J. A. Sloane

Keywords

• base
• easy
• nonn

Links

• T. D. Noe, Table of n, a(n) for n = 0..1000

Crossrefs

Cf. A007089, A000290.

Programs

Mathematica

Table[FromDigits[IntegerDigits[n^2, 3]], {n, 0, 50}] (* T. D. Noe, Aug 10 2012 *)

Formula

a(n) = A007089(A000290(n)). - Jason Kimberley, Dec 13 2012