1,3
1. One and only one route exists on all edges of G
2. Terminals of two different routes don't meet on the same point
Cf. A131709.
Sequence in context: A177496 A104403 A144422 * A087886 A123754 A048354
Adjacent sequences: A135441 A135442 A135443 * A135445 A135446 A135447
nonn
Yasutoshi Kohmoto zbi74583(AT)boat.zero.ad.jp, Feb 18 2008