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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:38AB GHM

Order: 18

Horizontal side: 38 Vertical side: 38

Elements: 1√2, 6, 7, 8, 6√2, 9, 7√2, 11, 8√2, 12, 9√2, 14, 15, 11√2, 16, 12√2, 18, 20.

Code: 207 0 38 120 20 38 121 32 38 62 38 32 61 38 38 143 38 18 86 0 18 167 8 26 153 24 11 87 24 26 92 9 9 75 24 11 74 31 11 183 38 0 16 8 10 115 9 0 114 20 0 93 9 0

The properties below may precede order:side in a tiling's title:

Credit for Discovery

Just three people are credited with the discovery of Primitive Perfects:

Geoffrey H. Morley (GHM, England)

Jasper D. Skinner, II (JDS, United States)

William T. Tutte (WTT, Canada, 1917-2002) (15:44AI, 17:136AJ and 19:56AJ only)

20
12√2
12
6√2
6
14
8√2
16
15
8
9√2
7
7√2
18
1√2
11
11√2
9