st_coordinates()
sf
inla()
nb
[[1]] [1] 2 3 [[2]] [1] 1 3 4 [[3]] [1] 1 2 4 5 [[4]] [1] 2 3 5 8 [[5]] [1] 3 4 6 8 9 11 15 16 [[6]] [1] 5 9