id:A056401 - OEIS Search Results

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Number of primitive (aperiodic) step shifted (decimated) sequence structures using a maximum of two different symbols.

+0
3

1, 1, 2, 4, 5, 16, 13, 42, 49, 133, 107, 600, 351, 1385, 2164, 4416, 4115, 22043, 14601, 67872, 88360, 209827, 190745, 1074534, 839122, 2796647, 3730532, 11275300, 9587579, 67193198, 35792567 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`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	`Sum mu(d)*A056391(n/d) where d divides n.`
	CROSSREFS	`Cf. A056381.` `Sequence in context: A121410 A002959 A071316 this_sequence A056406 A070917 A038757` `Adjacent sequences: A056398 A056399 A056400 this_sequence A056402 A056403 A056404`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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