A056410 - OEIS

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A056410

Number of primitive (aperiodic) step shifted (decimated) sequence structures using exactly six different symbols.

0, 0, 0, 0, 0, 1, 4, 83, 454, 5761, 17998, 334796, 777107, 10574991, 52611728, 342198939, 1094122103, 18448004164, 38504610244, 538330828006, 2215487105213, 16330536692133, 45407723468330 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,7`
	COMMENTS	`See A056371 for an explanation of step shifts. Permuting the symbols will not change the structure.`
	REFERENCES	`M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.`
	FORMULA	`A056405(n)-A056404(n).`
	CROSSREFS	`Cf. A056390.` `Sequence in context: A133396 A158981 A007154 * A056400 A119514 A102982` `Adjacent sequences: A056407 A056408 A056409 * A056411 A056412 A056413`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified February 16 01:31 EST 2012. Contains 205860 sequences.