A001737 Squares written in base 2.

0, 1, 100, 1001, 10000, 11001, 100100, 110001, 1000000, 1010001, 1100100, 1111001, 10010000, 10101001, 11000100, 11100001, 100000000, 100100001, 101000100, 101101001, 110010000, 110111001, 111100100, 1000010001, 1001000000, 1001110001, 1010100100, 1011011001

Offset

0,3

Links

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

Formula

a(n) = A007088(A000290(n)). - Reinhard Zumkeller, Apr 25 2009

Mathematica

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

Prog

(Python) print([int(bin(k**2)[2:]) for k in range(0, 28)]) # Karl-Heinz Hofmann, Feb 01 2022

Crossrefs

Cf. A000290, A007088, A159918.

Sequence in context: A173484 A136387 A379268 * A266838 A267127 A266893

Adjacent sequences: A001734 A001735 A001736 * A001738 A001739 A001740

Keyword

base,easy,nonn

Author

N. J. A. Sloane

Status

approved