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A056485 Number of primitive (aperiodic) palindromic structures using exactly six different symbols. 2
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 (list; graph; refs; listen; history; text; internal format)
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 A219401

Adjacent sequences:  A056482 A056483 A056484 * A056486 A056487 A056488

KEYWORD

nonn

AUTHOR

Marks R. Nester

STATUS

approved

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Last modified January 26 11:03 EST 2020. Contains 331279 sequences. (Running on oeis4.)