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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.

A057707 a(n) is the number of free 'polyominoes' on the (4.8.8) grid with n octagons and n squares.

Original entry on oeis.org

1, 8, 80, 1296, 22601, 426305, 8340302, 167925635, 3453618607
Offset: 1

Views

Author

Warren Power (wjpnply(AT)hotmail.com), Oct 24 2000

Keywords

Comments

This sequence enumerates a subset of the polyforms enumerated by A343577. - John Mason, Jan 15 2023

Links

Crossrefs

Cf. A343577.

Extensions

Better description from Larry Reeves (larryr(AT)acm.org), Nov 30 2000
a(6)-a(8) from John Mason, Jan 15 2023
a(9) from John Mason, Mar 01 2023

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