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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 (list; graph; refs; listen; history; text; internal format)
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. 278-287

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

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Last modified March 5 16:55 EST 2021. Contains 341827 sequences. (Running on oeis4.)