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Search: id:A056437
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| A056437 |
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Step cyclic shifted sequence structures using exactly five different symbols. |
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1
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| 0, 0, 0, 0, 1, 3, 6, 52, 148, 1140, 2306, 30121, 48476, 478957, 1762917, 8601630, 20789656, 268188642, 431583572, 4685759111, 15045763312, 86991023001, 190548007556, 2526401808203, 4873374476388, 39199367162137
(list; graph; listen)
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OFFSET
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1,6
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COMMENT
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See A056371 for an explanation of step shifts. Under step cyclic shifts, abcde, bdace, bcdea, cdeab and daceb etc. are equivalent. Permuting the symbols will not change the structure.
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REFERENCES
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M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
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FORMULA
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A056432(n)-A056431(n).
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CROSSREFS
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Cf. A056418.
Sequence in context: A111752 A102931 A056447 this_sequence A012275 A067608 A023177
Adjacent sequences: A056434 A056435 A056436 this_sequence A056438 A056439 A056440
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KEYWORD
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nonn
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AUTHOR
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Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
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