A255745 a(1) = 1; for n > 1, a(n) = 11*10^{A000120(n-1)-1}.

1, 11, 11, 110, 11, 110, 110, 1100, 11, 110, 110, 1100, 110, 1100, 1100, 11000, 11, 110, 110, 1100, 110, 1100, 1100, 11000, 110, 1100, 1100, 11000, 1100, 11000, 11000, 110000, 11, 110, 110, 1100, 110, 1100, 1100, 11000, 110, 1100, 1100, 11000, 1100, 11000, 11000

Offset

1,2

Comments

Also, this is a row of the square array A255740.

Partial sums give A255766.

Is this also A151787 written in base 2?

Links

Table of n, a(n) for n=1..47.

Example

Also, written as an irregular triangle in which the row lengths are the terms of A011782, the sequence begins:
1;
11;
11, 110;
11, 110, 110, 1100;
11, 110, 110, 1100, 110, 1100, 1100, 11000;
...

Prog

(PARI) a(n) = if (n==1, 1, 11*10^(hammingweight(n-1)-1)); \\ Michel Marcus, Mar 13 2015

Crossrefs

Cf. A000120, A151787, A147582, A151789, A151779, A151791, A151782, A255740, A255741, A255743, A255744, A255766.

Sequence in context: A088773 A069588 A088774 * A188548 A290671 A290416

Adjacent sequences: A255742 A255743 A255744 * A255746 A255747 A255748

Keyword

nonn

Author

Omar E. Pol, Mar 05 2015

Extensions

More terms from Michel Marcus, Mar 13 2015

Status

approved