A138712 n-th run has length n-th positive triangular number, with digits 0 and 1 only, starting with 0.

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

Offset: 1

Author

Omar E. Pol, Mar 29 2008

Keywords

• easy
• nonn

Examples

			.n ..... Run ............................... Length
.1 ..... 0 ................................. 1
.2 ..... 1,1,1 ............................. 3
.3 ..... 0,0,0,0,0,0........................ 6
.4 ..... 1,1,1,1,1,1,1,1,1,1 ............... 10
.5 ..... 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ..... 15
		

Crossrefs

Cf. A000217, A057212, A138150, A138710.