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A289709 Number of independent vertex sets and vertex covers in the n-triangular honeycomb queen graph. 1
2, 4, 10, 28, 84, 272, 946, 3486, 13560, 55432, 236852, 1054928 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..12.

Eric Weisstein's World of Mathematics, Independent Vertex Set

Eric Weisstein's World of Mathematics, Vertex Cover

CROSSREFS

Sequence in context: A202135 A068875 A262543 * A192574 A135336 A149825

Adjacent sequences:  A289706 A289707 A289708 * A289710 A289711 A289712

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Jul 14 2017

STATUS

approved

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Last modified November 17 08:17 EST 2018. Contains 317275 sequences. (Running on oeis4.)