A005889 - OEIS

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A005889

Theta series of hexagonal close-packing with respect to triangle between octahedra.
(Formerly M2203)

3, 0, 6, 3, 0, 6, 6, 0, 18, 0, 0, 6, 6, 0, 24, 3, 0, 6, 12, 0, 24, 6, 0, 6, 15, 0, 18, 6, 0, 12, 18, 0, 24, 6, 0, 18, 18, 0, 36, 0, 0, 0, 12, 0, 36, 12, 0, 6, 21, 0, 48, 6, 0, 18, 12, 0, 36, 0, 0, 24, 18, 0, 36, 3, 0, 12 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	REFERENCES	`N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).`
	LINKS	`Table of n, a(n) for n=1..66.` `N. J. A. Sloane and B. K. Teo, Theta series and magic numbers for close-packed spherical clusters, J. Chem. Phys. 83 (1985) 6520-6534.`
	CROSSREFS	`Sequence in context: A005928 A113062 A259659 * A095712 A085753 A120008` `Adjacent sequences: A005886 A005887 A005888 * A005890 A005891 A005892`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane.`
	STATUS	`approved`

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Last modified January 15 14:53 EST 2021. Contains 340187 sequences. (Running on oeis4.)