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 A061657 Numbers k > 1 such that, in base 3, k and k^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: A272126 A171563 A347504 * A217301 A351278 A239457 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 March 3 04:01 EST 2024. Contains 370499 sequences. (Running on oeis4.)