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A056483 Number of primitive (aperiodic) palindromic structures using exactly four different symbols. +0
2
0, 0, 0, 0, 0, 0, 1, 1, 10, 10, 65, 65, 350, 349, 1701, 1700, 7770, 7760, 34105, 34095, 145749, 145685, 611501, 611435, 2532530, 2532180, 10391735, 10391395, 42355950, 42354239, 171798901 (list; graph; listen)
OFFSET

1,9

COMMENT

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.

FORMULA

A056478(n)-A056477(n).

CROSSREFS

Cf. A056465.

Sequence in context: A003875 A111220 A106789 this_sequence A056473 A102377 A038312

Adjacent sequences: A056480 A056481 A056482 this_sequence A056484 A056485 A056486

KEYWORD

nonn

AUTHOR

Marks R. Nester (nesterm(AT)dpi.qld.gov.au)

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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