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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.

A006813 Percolation series for directed hexagonal lattice.

Original entry on oeis.org

3, 9, 21, 48, 105, 219, 459, 936
Offset: 1

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Author

N. J. A. Sloane

Keywords

Comments

The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice.

References

  • N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

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

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