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A056385
Number of primitive (aperiodic) step shifted (decimated) sequences using a maximum of six different symbols.
1
6, 30, 120, 720, 2010, 23820, 46950, 434700, 1683450, 15126810, 36284466, 547180200, 1088416050, 13060942950, 58782162480, 352913410080, 1057916846190, 16926687985950, 33853322280030
OFFSET
1,1
COMMENTS
See A056371 for an explanation of step shifts.
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)*A056375(n/d) where d|n.
CROSSREFS
Sequence in context: A182349 A371036 A215225 * A266945 A369819 A073970
KEYWORD
nonn
STATUS
approved