id:A056313 - OEIS Search Results

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Number of reversible strings with n beads using exactly six different colors.

+0
3

0, 0, 0, 0, 0, 360, 7560, 95760, 952560, 8217720, 64615680, 476515080, 3355679880, 22837101840, 151449674040, 984573656640, 6302070915840, 39847411326600, 249509384858160, 1550188410555960, 9570844671224760 (list; graph; listen)

	OFFSET	`1,6`
	COMMENT	`A string and its reverse are considered to be equivalent.`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	FORMULA	`A056308(n)-6A032122(n)+15A032121(n)-20A032120(n)+15A005418(n+1)-6.`
	CROSSREFS	`Cf. A056308, A056322.` `Sequence in context: A024185 A033592 A056322 this_sequence A054648 A166785 A145412` `Adjacent sequences: A056310 A056311 A056312 this_sequence A056314 A056315 A056316`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.

AT&T Labs Research