A056485 Number of primitive (aperiodic) palindromic structures using exactly six different symbols.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 21, 21, 266, 266, 2646, 2646, 22827, 22827, 179487, 179486, 1323652, 1323651, 9321312, 9321291, 63436373, 63436352, 420693273, 420693007, 2734926558

Offset

1,13

Comments

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..31.

Formula

A056480(n)-A056479(n).

Crossrefs

Column 6 of A284826.

Cf. A056467.

Sequence in context: A048245 A246034 A220689 * A056475 A219913 A372351

Adjacent sequences: A056482 A056483 A056484 * A056486 A056487 A056488

Keyword

nonn

Author

Marks R. Nester

Status

approved