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.

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A130616 Number of triangular polyominoes (or polyiamonds) with perimeter at most n.

Original entry on oeis.org

0, 0, 1, 2, 3, 7, 12, 28, 65, 185
Offset: 1

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Author

Tanya Khovanova, Aug 10 2007

Keywords

Comments

Partial sums of A057729 - Number of triangular polyominoes (or polyiamonds) with perimeter n. a(n+2) >= A130867(n) - Triangular polyominoes (or polyiamonds) with n cells at most.

Crossrefs

Cf. A131481 (number of n-cell polyiamonds with perimeter n+2).

Extensions

Offset corrected by John Mason, Jan 16 2023
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