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

1,3

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]

Links

Table of n, a(n) for n=1..24.

Formula

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

Crossrefs

Cf. A056384.

Sequence in context: A321869 A009211 A105538 * A056405 A009216 A103072

Adjacent sequences: A056401 A056402 A056403 * A056405 A056406 A056407

Keyword

nonn

Author

Marks R. Nester

Status

approved