OFFSET
1,4
COMMENTS
A few 3-substitution sequences:
A191250: 0 -> 01, 1 -> 02, 2 -> 001
A191254: 0 -> 01, 1 -> 02, 2 -> 01
A191255: 0 -> 01, 1 -> 02, 2 -> 03, 3 -> 01
A191258: 0 -> 01, 1 -> 02, 2 -> 03, 3 -> 001
A191261: 0 -> 01, 1 -> 002, 2 -> 01
A191265: 0 -> 001, 1 -> 002, 2 -> 01
A191269: 0 -> 001, 1 -> 02, 2 -> 01
MATHEMATICA
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, May 28 2011
STATUS
approved