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A056416
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Number of step cyclic shifted sequences using exactly three different symbols.
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2
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0, 0, 1, 6, 9, 56, 51, 258, 380, 1500, 1611, 12298, 10245, 57108, 121721, 346146, 474489, 3589534, 3397143, 21984804, 41570773, 142619388, 186027579, 1476414178, 1694455320, 8146633638, 15690141155
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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COMMENTS
| See A056371 for an explanation of step shifts. Under step cyclic shifts, abcde, bdace, bcdea, cdeab and daceb etc. are equivalent.
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REFERENCES
| M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.
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FORMULA
| A056411(n)-3*A002729(n)+3.
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CROSSREFS
| Cf. A056411.
Sequence in context: A126110 A098662 A056425 * A061401 A046498 A119738
Adjacent sequences: A056413 A056414 A056415 * A056417 A056418 A056419
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KEYWORD
| nonn
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AUTHOR
| Marks R. Nester (nesterm(AT)dpi.qld.gov.au)
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