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A061657 In base 3 n and n^2 contain the same digits in the same proportion. 12
184, 196, 464, 500, 544, 550, 552, 584, 588, 622, 626, 670, 706, 1392, 1436, 1472, 1500, 1552, 1632, 1650, 1654, 1656, 1744, 1752, 1764, 1866, 1868, 1878, 1978, 2010, 2030, 2116, 2118, 3922, 4136, 4176, 4308, 4388, 4416, 4500, 4656, 4732, 4756, 4896, 4900 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 1..10000

EXAMPLE

184 = 20211_3 and 184^2 = 1201102221_3.

MAPLE

p:= n-> add(x^i, i=convert(n, base, 3)):

a:= proc(n) option remember; local k;

      for k from 1+`if`(n=1, 0, a(n-1))

      while p(k)*2<>p(k^2) do od; k

    end:

seq(a(n), n=1..50);  # Alois P. Heinz, May 10 2015

CROSSREFS

Cf. A061656, A061658, A061659, A061660, A061661, A061662, A061663, A114258, A061664.

Sequence in context: A193253 A272126 A171563 * A217301 A239457 A235258

Adjacent sequences:  A061654 A061655 A061656 * A061658 A061659 A061660

KEYWORD

base,easy,nonn

AUTHOR

Erich Friedman, Jun 16 2001

EXTENSIONS

Offset changed to 1 by Alois P. Heinz, May 10 2015

STATUS

approved

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Last modified July 21 02:02 EDT 2019. Contains 325189 sequences. (Running on oeis4.)