

A251419


Dominance number for triangle grid graph TG_n.


4



1, 1, 2, 3, 3, 5, 6, 7, 9, 10, 13, 15, 17, 19, 21, 24, 27, 30, 33, 36, 40, 43, 47, 51, 55, 59, 63, 68, 72, 77, 82
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OFFSET

1,3


COMMENTS

Conjectured to equal floor((n^2 + 7n  23)/14) for n >= 14. See A251418.


LINKS

Table of n, a(n) for n=1..31.
Stan Wagon, Graph Theory Problems from Hexagonal and Traditional Chess, The College Mathematics Journal, Vol. 45, No. 4, September 2014, pp. 278287
Eric Weisstein's World of Mathematics, Domination Number
Eric Weisstein's World of Mathematics, Triangular Grid Graph


CROSSREFS

Cf. A251418.
Sequence in context: A338375 A220838 A236294 * A036410 A008670 A338887
Adjacent sequences: A251416 A251417 A251418 * A251420 A251421 A251422


KEYWORD

nonn,more


AUTHOR

N. J. A. Sloane, Dec 04 2014


STATUS

approved



