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A297061 Number of edge covers in the n X n triangular grid graph. 1
0, 4, 198, 84682, 281721996, 7392711987818, 1528658402287559670, 2490983667363798650708788, 31987702603596066902310936860946, 3237032742135065575663156511653859260726, 2581445727611992619431296420645395411748335733438 (list; graph; refs; listen; history; text; internal format)
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 A034862 A174776

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

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Last modified May 6 15:20 EDT 2021. Contains 343586 sequences. (Running on oeis4.)