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.

A057779 Number of hexagonal polyominoes (or polyhexes, A000228) with perimeter 2n.

Original entry on oeis.org

0, 0, 1, 0, 1, 1, 3, 2, 12, 14, 50, 98, 313, 750, 2308, 6270
Offset: 1

Views

Author

N. J. A. Sloane, Oct 29 2000

Keywords

Links

Crossrefs

Cf. A000228, A000105, A057730, A258206 (counts only polyhexes without holes).

Extensions

Link updated by William Rex Marshall, Dec 16 2009
a(13)-a(16) from John Mason, Jul 26 2021

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

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