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A164344 A positive integer is included if its square contains the same number of 0's as 1's when represented in binary. 2
3, 7, 13, 15, 25, 29, 31, 54, 57, 61, 63, 103, 110, 113, 118, 121, 125, 127, 199, 203, 207, 212, 213, 214, 218, 230, 238, 241, 246, 249, 253, 255, 389, 393, 394, 395, 402, 404, 409, 421, 431, 433, 435, 439, 458, 468, 478, 481, 486, 494, 497, 502, 505, 509, 511 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

sn01Q[n_]:=Module[{idn2=IntegerDigits[n^2, 2]}, Count[idn2, 1] == Length[ idn2]/2]; Select[Range[600], sn01Q] (* Harvey P. Dale, Apr 03 2016 *)

CROSSREFS

A031443, A164343

Sequence in context: A002236 A255682 A080565 * A002254 A060657 A192148

Adjacent sequences:  A164341 A164342 A164343 * A164345 A164346 A164347

KEYWORD

base,nonn

AUTHOR

Leroy Quet, Aug 13 2009

EXTENSIONS

More terms from Sean A. Irvine, Oct 08 2009

STATUS

approved

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Last modified October 20 22:44 EDT 2019. Contains 328291 sequences. (Running on oeis4.)