A075679 - OEIS

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A075679

Number of free (rotations and reflections count as same shape) polyominoids (shapes made of faces of cubes) with n squares.

12

1, 2, 9, 54, 448, 4650, 53611, 655033, 8259635, 106371085, 1391032357, 18412269694

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..12.

John Mason, Drawings of polyominoids of sizes 1 through 5

Skye Rothstein, Folding and Embedding Cubical Complexes, Undergraduate senior project, Bard College (2024). See p. 9.

Wikipedia, Polyominoid

CROSSREFS

Cf. A075678, A056846.

18th row of A366766.

Sequence in context: A353255 A254795 A064151 * A001757 A267225 A078455

Adjacent sequences: A075676 A075677 A075678 * A075680 A075681 A075682

KEYWORD

hard,more,nonn

AUTHOR

Joseph Myers, Sep 24 2002

STATUS

approved