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A056419
Number of step cyclic shifted sequences using exactly six different symbols.
2
0, 0, 0, 0, 0, 60, 360, 6030, 35280, 410976, 1174896, 19948200, 43022700, 543757860, 2524673904, 15399118440, 46338868800, 737917466160, 1459120076400, 19381180990752, 75959665269840, 534453892557660
OFFSET
1,6
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
A056414(n)-6*A056413(n)+15*A056412(n)-20*A056411(n)+15*A002729(n)-6.
CROSSREFS
Cf. A056414.
Sequence in context: A119631 A269048 A056428 * A060489 A088942 A135037
KEYWORD
nonn
STATUS
approved