id:A038590 - OEIS Search Results

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Sizes of clusters in hexagonal lattice A_2 centered at lattice point.

+0
5

1, 7, 13, 19, 31, 37, 43, 55, 61, 73, 85, 91, 97, 109, 121, 127, 139, 151, 163, 169, 187, 199, 211, 223, 235, 241, 253, 265, 271, 283, 295, 301, 313, 337, 349, 361, 367, 379, 385, 397, 409, 421, 433, 439, 451, 463, 475, 499, 511, 517, 535, 547 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice.`
	LINKS	`G. Nebe and N. J. A. Sloane, Home page for hexagonal (or triangular) lattice A2`
	FORMULA	`unique(A038589).`
	CROSSREFS	`Cf. A004016, A038589.` `Sequence in context: A088513 A004611 A133290 this_sequence A129389 A107925 A002476` `Adjacent sequences: A038587 A038588 A038589 this_sequence A038591 A038592 A038593`
	KEYWORD	`nonn,easy,nice`
	AUTHOR	`njas`

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.

AT&T Labs Research