A056400 - OEIS

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A056400

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

0, 0, 0, 0, 0, 1, 4, 83, 454, 5761, 17998, 334797, 777107, 10574995, 52611728, 342199022, 1094122103, 18448004619, 38504610244, 538330833767, 2215487105217, 16330536710131, 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	`A056395(n)-A056394(n).`
	CROSSREFS	`Cf. A056380.` `Sequence in context: A158981 A007154 A056410 * A119514 A102982 A172138` `Adjacent sequences: A056397 A056398 A056399 * A056401 A056402 A056403`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified February 14 18:47 EST 2012. Contains 205663 sequences.