A056410 Number of primitive (aperiodic) step shifted (decimated) sequence structures using exactly six different symbols.

0, 0, 0, 0, 0, 1, 4, 83, 454, 5761, 17998, 334796, 777107, 10574991, 52611728, 342198939, 1094122103, 18448004164, 38504610244, 538330828006, 2215487105213, 16330536692133, 45407723468330

Offset

1,7

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..23.

Formula

A056405(n)-A056404(n).

Crossrefs

Cf. A056390.

Sequence in context: A317889 A291371 A007154 * A056400 A248382 A292409

Adjacent sequences: A056407 A056408 A056409 * A056411 A056412 A056413

Keyword

nonn

Author

Marks R. Nester

Status

approved