id:A056408 - OEIS Search Results

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

+0
1

0, 0, 0, 1, 3, 37, 63, 478, 1316, 8594, 14619, 155961, 211231, 1732844, 5302820, 21559430, 43398413, 466493982, 625545865, 5659491433, 15126813702, 72778010746, 132561145173, 1460519397614, 2338565021379 (list; graph; listen)

	OFFSET	`1,5`
	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	`A056403(n)-A056402(n).`
	CROSSREFS	`Cf. A056388.` `Sequence in context: A047691 A091824 A139842 this_sequence A056398 A092074 A107183` `Adjacent sequences: A056405 A056406 A056407 this_sequence A056409 A056410 A056411`
	KEYWORD	`nonn`
	AUTHOR	`Marks R. Nester (nesterm(AT)dpi.qld.gov.au)`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research