T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock summing to 2 3 4 5 or 6.
A251390
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock summing to 2 3 4 5 or 6.
Terms
- a(0) =71a(1) =571a(2) =571a(3) =4585a(4) =12457a(5) =4585a(6) =36825a(7) =271393a(8) =271393a(9) =36825a(10) =295759a(11) =5914339a(12) =16036923a(13) =5914339a(14) =295759a(15) =2375387a(16) =128887759a(17) =948010753a(18) =948010753a(19) =128887759a(20) =2375387a(21) =19077905a(22) =2808783981a(23) =56040713651a(24) =152031391763a(25) =56040713651
External references
- oeis: A251390