A297061 Number of edge covers in the n X n triangular grid graph.

0, 4, 198, 84682, 281721996, 7392711987818, 1528658402287559670, 2490983667363798650708788, 31987702603596066902310936860946, 3237032742135065575663156511653859260726, 2581445727611992619431296420645395411748335733438

Offset

0,2

Links

Table of n, a(n) for n=0..10.

Eric Weisstein's World of Mathematics, Edge Cover

Eric Weisstein's World of Mathematics, Triangular Graph

Crossrefs

Cf. A269869.

Sequence in context: A209288 A263422 A065246 * A156235 A356214 A034862

Adjacent sequences: A297058 A297059 A297060 * A297062 A297063 A297064

Keyword

nonn

Author

Eric W. Weisstein, Dec 24 2017

Extensions

a(5)-a(10) from Andrew Howroyd, Dec 27 2017

Status

approved