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

Author

N. J. A. Sloane, Feb 23 2003

Keywords

• nonn

Crossrefs

Equals A080586 - 1.

Programs

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 *)

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