1,2

Table of n, a(n) for n=1..11.

Eric Weisstein's World of Mathematics, Minimum Dominating Set

Eric Weisstein's World of Mathematics, Triangular Grid Graph

Cf. A251419, A287064, A288721.

Sequence in context: A057730 A074432 A212650 * A137089 A197470 A148664

Adjacent sequences: A297569 A297570 A297571 * A297573 A297574 A297575

nonn,more

Eric W. Weisstein, Dec 31 2017

a(9)-a(11) from Andrew Howroyd, Jan 02 2018

approved