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A056484
Number of primitive (aperiodic) palindromic structures using exactly five different symbols.
2
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 15, 15, 140, 140, 1050, 1050, 6951, 6950, 42525, 42524, 246730, 246715, 1379400, 1379385, 7508501, 7508361, 40075034, 40074895, 210766920, 210765869, 1096190550
OFFSET
1,11
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]
FORMULA
CROSSREFS
Column 5 of A284826.
Cf. A056466.
Sequence in context: A022349 A036379 A070920 * A056474 A219912 A240980
KEYWORD
nonn
STATUS
approved