OFFSET
1,2
COMMENTS
Think of binary n as a string S of 0's and 1's. By a "run" of 0's or 1's, it is meant either a substring all of contiguous 0's, each run bounded by 1's or the edge of S; or a substring all of contiguous 1's, each run bounded by 0's or the edge of S.
EXAMPLE
The terms of the first few rows of the triangle converted to binary:
1
100, 11
100011, 11000, 111
1000011000, 110000111, 1110000, 1111
Note that all terms in row n have a run with n 0s or 1's (and no run of more 0's or 1s), and all terms in column m have a run of m 0's or 1's (but no run of fewer 0's or 1's). Each length of run occurs exactly once in each binary number.
CROSSREFS
KEYWORD
AUTHOR
Leroy Quet, Jun 01 2009
EXTENSIONS
Extended by Ray Chandler, Jun 13 2009
STATUS
approved