18 7 6 6 = 3250
LJCR Simple construction: combined (17,7,6) and (17,6,5)
https://ljcr.dmgordon.org/show_cover.php?v=18&k=7&t=6
inversa 18,11,11,12 = 3250
21 6 5 5 = 3863
LJCR Simple construction: combined (20,6,5) and (20,5,4)
https://ljcr.dmgordon.org/show_cover.php?v=21&k=6&t=5
inversa 21, 15,15,16 = 3863
22 11 7 7 = 1098
Alessandro Jurcovich
https://ljcr.dmgordon.org/show_cover.php?v=22&k=11&t=7
Inversa 22,11,11,15 = 1098