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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.

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A377978 Total number of coronal tilings for a width one length n straight polyiamond with the T2 triangle.

Original entry on oeis.org

2, 2, 6, 11, 6, 2, 6, 11, 6, 2, 6, 11, 6, 2
Offset: 1

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Author

Craig Knecht, Nov 26 2024

Keywords

Comments

Heesch numbers look at the buildout of coronal layers from a single type of tile. In contrast this sequence looks at a single type of tile being asked to form a corona around an expanding central frame.
This central frame tiled with the hexiamond boat tile has a coronal expansion number of 12 (see links below).
A376899 shows coronal tilings for the expansion of a central triangle frame and gives the definition for the coronal expansion number.
Combining individual polyiamonds in various ways creates a variety of expansion frames.Craig Knecht, Nov 29 2024

Links

Crossrefs

Cf. A376899.
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