A108508 Number of paths of length n between two arbitrary, distinct vertices in K6, the complete graph on 6 vertices.
1, 4, 12, 48, 180, 528, 1392, 3600, 7920, 13680, 21840, 31872, 25008
Offset: 1
Examples
a(5) = 180 because there are 180 paths of length 5 between two arbitrary, distinct vertices in K6.
Links
- Eric Weisstein's World of Mathematics, Complete Graph.