A080584 A run of 3*2^n 0's followed by a run of 3*2^n 1's, for n=0, 1, 2, ...

0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset

0,1

Links

Table of n, a(n) for n=0..104.

Formula

a(n) = (1 - (-1)^A079944(A002264(n)) )/2, A079944(A002264(n))=floor(log[2](4*(floor((n+6)/3))/3)) - floor(log[2](floor((n+6)/3))) - Antonio G. Astudillo (afg_astudillo(AT)hotmail.com), Feb 24 2003

Also a(n) = A079944(A002264(n)) = floor(log[2](4*(floor((n+6)/3))/3)) - floor(log[2](floor((n+6)/3))) - Antonio G. Astudillo (afg_astudillo(AT)hotmail.com), Feb 24 2003

Maple

f := (c, n)->seq(c, i = 1..3*2^n); [f(0, 0), f(1, 0), f(0, 1), f(1, 1), f(0, 2), f(1, 2), f(0, 3), f(1, 3)]; f;

Mathematica

Flatten[Table[{PadRight[{}, 3*2^n, 0], PadRight[{}, 3*2^n, 1]}, {n, 0, 4}]] (* Harvey P. Dale, Jun 01 2012 *)

Crossrefs

Equals A080586 - 1.

Sequence in context: A274950 A093383 A093384 * A316824 A118953 A023970

Adjacent sequences: A080581 A080582 A080583 * A080585 A080586 A080587

Keyword

nonn

Author

N. J. A. Sloane, Feb 23 2003

Status

approved