7-omino, order 78, [21 by 26]

• The polyomino is not reflective.
• The tile is a 7-omino.
• The rectangle is 21*26 (ratio: 1.2380952380952381).

1. (From Karl Dahlke, February 1997) of B A Wichmann. The World of Patterns, World Scientific, 2001. ISBN 981024619. [wich2] {Only new patterns ascribed to this.}
2. Figure 8.17, page 136 of George E Martin. Polyominoes, The Mathematical Association of America, 1991. ISBN 088385501. [martin] {}

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