cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-2 of 2 results.

A056406 Number of primitive (aperiodic) step shifted (decimated) sequence structures using exactly two different symbols.

Original entry on oeis.org

0, 1, 2, 4, 5, 16, 13, 42, 49, 133, 107, 600, 351, 1385, 2164, 4416, 4115, 22043, 14601, 67872, 88360, 209827, 190745, 1074534, 839122, 2796647, 3730532, 11275300, 9587579, 67193198, 35792567
Offset: 1

Views

Author

Marks R. Nester

Keywords

Comments

See A056371 for an explanation of step shifts. Permuting the symbols will not change the structure. Identical to A056401 for n>1.

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]

Crossrefs

Cf. A056386.

Formula

A056401(n)-A000007(n-1).

A056407 Number of primitive (aperiodic) step shifted (decimated) sequence structures using exactly three different symbols.

Original entry on oeis.org

0, 0, 1, 4, 8, 49, 54, 280, 524, 2362, 2872, 22694, 21866, 131696, 298783, 904634, 1341518, 10744516, 10748218, 72886710, 145274501, 522816718, 713023210, 5892611212, 7059926597, 35300963684, 70604007679
Offset: 1

Views

Author

Marks R. Nester

Keywords

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]

Crossrefs

Cf. A056387.

Formula

A056402(n)-A056401(n).
Showing 1-2 of 2 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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