A075678 Number of fixed (orientation matters) polyominoids (shapes made of faces of cubes) with n squares.

3, 18, 158, 1611, 17811, 207395, 2505858, 31125711, 394982973, 5098498323, 66733261455, 883602795509, 11814191512434, 159283419280014, 2163058572006613

Offset: 1

Author

Joseph Myers, Sep 24 2002

Keywords

• hard
• nonn
• more

Links

• Jorge Luis Mireles Jasso, The Polyominoids (gives a(4) and a(6))

Crossrefs

Cf. A075679 (free), A056846.

18th row of A366767.

Extensions

a(13)-a(15) from John Mason, Mia Muessig, and Érika Roldán, Jul 04 2025