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A056409
Number of primitive (aperiodic) step shifted (decimated) sequence structures using exactly five different symbols.
0
0, 0, 0, 0, 1, 9, 26, 299, 1183, 10700, 24736, 349232, 626053, 6680953, 26364609, 137246955, 353304459, 4826416835, 8199440662, 93679518802, 315943737305, 1913783049725, 4382586624256, 60629067426943
OFFSET
1,6
COMMENTS
See A056371 for an explanation of step shifts. 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
Cf. A056389.
Sequence in context: A084813 A322764 A325585 * A056399 A256927 A135864
KEYWORD
nonn
STATUS
approved