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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:42AA GHM

Order: 18

Horizontal side: 42 Vertical side: 42

Elements: 1, 1√2, 2, 2√2, 3, 4, 5, 8, 9, 7√2, 8√2, 9√2, 16, 18, 19, 23, 17√2, 21√2.

Code: 235 0 19 214 21 21 183 42 24 33 24 21 95 24 15 94 33 15 163 42 8 21 23 21 12 24 20 11 24 21 53 24 15 197 0 19 26 17 17 47 19 19 170 17 17 74 26 8 84 34 0 83 42 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)

23
21√2
18
3
9
9√2
16
2
1√2
1
5
19
2√2
4
17√2
7√2
8√2
8