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A056402
Number of primitive (aperiodic) step shifted (decimated) sequence structures using a maximum of three different symbols.
2
1, 1, 3, 8, 13, 65, 67, 322, 573, 2495, 2979, 23294, 22217, 133081, 300947, 909050, 1345633, 10766559, 10762819, 72954582, 145362861, 523026545, 713213955, 5893685746, 7060765719, 35303760331
OFFSET
1,3
COMMENTS
See A056371 for an explanation of step shifts. 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]
FORMULA
Sum mu(d)*A056392(n/d) where d|n.
CROSSREFS
Cf. A056382.
Sequence in context: A281267 A346054 A153891 * A366071 A305179 A106386
KEYWORD
nonn
STATUS
approved