A hexomino is a 6-polyomino. There are 35 free hexominoes (illustrated above), 60 one-sided hexominoes, and 216 fixed hexominoes.
Hexomino
See also
Domino, Heptomino, Octomino, Pentomino, Polyomino, Tetromino, TriominoExplore with Wolfram|Alpha
References
Pappas, T. "Triangular, Square & Pentagonal Numbers." The Joy of Mathematics. San Carlos, CA: Wide World Publ./Tetra, p. 214, 1989.Referenced on Wolfram|Alpha
HexominoCite this as:
Weisstein, Eric W. "Hexomino." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Hexomino.html