T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise.
A235747
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise.
Terms
- a(0) =256a(1) =2982a(2) =2982a(3) =33640a(4) =103106a(5) =33640a(6) =343500a(7) =3493283a(8) =3493283a(9) =343500a(10) =3415268a(11) =102505743a(12) =351909466a(13) =102505743a(14) =3415268a(15) =32611962a(16) =2937817702a(17) =30537258362a(18) =30537258362a(19) =2937817702a(20) =32611962a(21) =306033109a(22) =78357821891
External references
- oeis: A235747