Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A257427
Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =2616a(1) =7652a(2) =27244a(3) =103575a(4) =367929a(5) =1246585a(6) =4137316a(7) =13275095a(8) =41621545a(9) =128299778a(10) =389217704a(11) =1165610625a(12) =3456006395a(13) =10159155410a(14) =29647440717a(15) =85997742083a(16) =248174114409a(17) =713062049952
External references
- oeis: A257427