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

Author

Omar E. Pol, Mar 05 2015

Keywords

• nonn

Comments

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

Partial sums give A255766.

Is this also A151787 written in base 2?

Examples

			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;
...
		

Crossrefs

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

Programs

PARI

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

Extensions

More terms from Michel Marcus, Mar 13 2015