|
|
A056448
|
|
Number of primitive (period n) step cyclic shifted sequence structures using exactly six different symbols.
|
|
0
|
|
|
0, 0, 0, 0, 0, 1, 1, 18, 59, 630, 1681, 28866, 60083, 757576, 3514504, 21423984, 64372109, 1024999170, 2026631203, 26920954613, 105501588414, 742299897060, 1974251382095, 31721456288956, 74052852505684
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,8
|
|
COMMENTS
|
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.
|
|
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]
|
|
LINKS
|
|
|
FORMULA
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|