A287232 Number of independent vertex sets and vertex covers in the n-tetrahedral graph.

271, 5596, 231577, 21286940, 4392750641, 2100400533176

Offset

6,1

Links

Table of n, a(n) for n=6..11.

Eric Weisstein's World of Mathematics, Independent Vertex Set

Eric Weisstein's World of Mathematics, Johnson Graph

Eric Weisstein's World of Mathematics, Tetrahedral Graph

Eric Weisstein's World of Mathematics, Vertex Cover

Crossrefs

Essentially the same as A323293.

Sequence in context: A108835 A185668 A296038 * A332978 A214012 A303886

Adjacent sequences: A287229 A287230 A287231 * A287233 A287234 A287235

Keyword

nonn,more

Author

Eric W. Weisstein, May 22 2017

Extensions

a(10) from Eric W. Weisstein, Jun 20 2017

a(11) from Eric W. Weisstein, Oct 12 2023

Status

approved