Number of (n+1) X (1+1) 0..2 arrays with every 2 X 2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.
A253517
Number of (n+1) X (1+1) 0..2 arrays with every 2 X 2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.
Terms
- a(0) =81a(1) =470a(2) =2180a(3) =9623a(4) =42669a(5) =192393a(6) =876277a(7) =4010555a(8) =18395493a(9) =84458827a(10) =387945181a(11) =1782308819a(12) =8189083701a(13) =37627550715a(14) =172896033837a(15) =794452690915
External references
- oeis: A253517