A038591 - OEIS

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A038591 - OEIS

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A038591

Sizes of clusters in hexagonal lattice A_2 with 3-fold symmetry.

1, 3, 6, 7, 12, 13, 18, 19, 21, 27, 30, 31, 36, 37, 42, 43, 48, 54, 55, 61, 63, 69, 73, 75, 78, 84, 85, 90, 91, 96, 97, 102, 109, 114, 120, 121, 123, 127, 129, 135, 139, 141, 144, 150, 151, 156, 163, 168, 169, 174, 180 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	COMMENTS	`The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice.`
	LINKS	`Table of n, a(n) for n=0..50.` `G. Nebe and N. J. A. Sloane, Home page for hexagonal (or triangular) lattice A2`
	CROSSREFS	`Union of A038588 and A038590.` `Sequence in context: A072757 A295897 A032849 * A333794 A349214 A182181` `Adjacent sequences: A038588 A038589 A038590 * A038592 A038593 A038594`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane.`
	STATUS	`approved`

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Last modified June 17 14:23 EDT 2024. Contains 373445 sequences. (Running on oeis4.)