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A056483 Number of primitive (aperiodic) palindromic structures using exactly four different symbols. 1
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; refs; listen; history; internal format)
OFFSET

1,9

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.

FORMULA

A056478(n)-A056477(n).

CROSSREFS

Cf. A056465.

Sequence in context: A003875 A111220 A106789 * A056473 A165831 A102377

Adjacent sequences:  A056480 A056481 A056482 * A056484 A056485 A056486

KEYWORD

nonn

AUTHOR

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

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Last modified February 16 19:03 EST 2012. Contains 205940 sequences.