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

1,1

Links

Table of n, a(n) for n=1..84.

Example

.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.

Sequence in context: A068717 A049240 A285978 * A029693 A200263 A051067

Adjacent sequences: A138709 A138710 A138711 * A138713 A138714 A138715

Keyword

easy,nonn

Author

Omar E. Pol, Mar 29 2008

Status

approved