A056404 Number of primitive (aperiodic) step shifted (decimated) sequence structures using a maximum of five different symbols.

1, 1, 3, 9, 17, 111, 156, 1099, 3072, 21789, 42334, 528487, 859501, 8546878, 31968376, 159715435, 398048505, 5303677376, 8835749346, 99411964817, 331215913868, 1987084087016, 4515860983384, 62095480510303

Offset: 1

Author

Marks R. Nester

Keywords

• nonn

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]

Crossrefs

Cf. A056384.

Formula

Sum mu(d)*A056394(n/d) where d|n.