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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
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. [See A056391 for pdf file of Chap. 2]
FORMULA
A056413(n)-5*A056412(n)+10*A056411(n)-10*A002729(n)+5.
CROSSREFS
Cf. A056413.
Sequence in context: A264645 A089480 A056427 * A346694 A070025 A291110
KEYWORD
nonn
STATUS
approved