A001739 Squares written in base 4.

0, 1, 10, 21, 100, 121, 210, 301, 1000, 1101, 1210, 1321, 2100, 2221, 3010, 3201, 10000, 10201, 11010, 11221, 12100, 12321, 13210, 20101, 21000, 21301, 22210, 23121, 30100, 31021, 32010, 33001, 100000, 101001, 102010, 103021, 110100, 111121, 112210, 113301

Offset

0,3

Links

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

Formula

a(n) = A007090(A000290(n)). - Jason Kimberley, Dec 13 2012

Mathematica

Table[FromDigits[IntegerDigits[n^2, 4]], {n, 0, 50}] (* T. D. Noe, Aug 10 2012 *)

Crossrefs

Sequence in context: A146083 A321722 A306208 * A072805 A119033 A171067

Adjacent sequences: A001736 A001737 A001738 * A001740 A001741 A001742

Keyword

base,easy,nonn

Author

N. J. A. Sloane

Status

approved