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A251532 Independence number of the n-triangular honeycomb obtuse knight graph. 0
1, 3, 6, 7, 7, 9, 15, 18, 21, 21, 27, 31, 36, 42, 42, 47, 54, 62, 70, 70, 77, 85, 95, 105 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..24.

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, Independence Number

CROSSREFS

Sequence in context: A129023 A188883 A152083 * A251533 A295849 A003458

Adjacent sequences:  A251529 A251530 A251531 * A251533 A251534 A251535

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Dec 04 2014

EXTENSIONS

a(20)-a(24) from Eric W. Weisstein, May 21-25 2017

STATUS

approved

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Last modified May 23 07:30 EDT 2019. Contains 323508 sequences. (Running on oeis4.)