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A056418 Number of step cyclic shifted sequences using exactly five different symbols. 2
0, 0, 0, 0, 6, 150, 400, 4080, 15480, 127818, 269340, 3493680, 5777190, 57262450, 210945182, 1030388115, 2493913170, 32176448060, 51785999300, 562228325904, 1805427491920, 10438821843750, 22865672706000 (list; graph; refs; listen; history; internal format)
OFFSET

1,5

COMMENTS

See A056371 for an explanation of step shifts. Under step cyclic shifts, abcde, bdace, bcdea, cdeab and daceb etc. are equivalent.

REFERENCES

M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia.

FORMULA

A056413(n)-5*A056412(n)+10*A056411(n)-10*A002729(n)+5.

CROSSREFS

Cf. A056413.

Sequence in context: A012791 A089480 A056427 * A070025 A065946 A013296

Adjacent sequences:  A056415 A056416 A056417 * A056419 A056420 A056421

KEYWORD

nonn

AUTHOR

Marks R. Nester (nesterm(AT)dpi.qld.gov.au)

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Last modified February 15 21:56 EST 2012. Contains 205860 sequences.