Elevenses

11n-2 11n+2 11n+2 11n+2
11n-2 11n+2 11n+2 11n-2
11n+3 11n-2 11n-2 11n
11n+4 11n-3 11n 11n-4

13n-2 13n+2 13n+2 13n+2
13n-2 13n+2 13n+2 13n-2
13n+3 13n-2 13n-2 13n
13n+4 13n-3 13n 13n-4