A385399 a(n) is the number of free polyominoids that have faces aligned to precisely 2 planes.
0, 1, 5, 33, 197, 1461, 11278, 93486, 799261
Offset: 1
Links
- John Mason, Illustration of size 3 polyominoids
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.
