n-th run has length n-th positive triangular number, with digits 0 and 1 only, starting with 1.
1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 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 seqfan posts
Sat Jan 10 10:51:59 CET 2009 [seqfan] Re: reminder: no OEIS for 24 hours