Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally and vertically.

A253930

Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally and vertically.

Terms

    a(0) =8392a(1) =30184a(2) =124496a(3) =451721a(4) =992616a(5) =2326216a(6) =4928792a(7) =8796936a(8) =15429736a(9) =25901691a(10) =41279336a(11) =64590680a(12) =98433380a(13) =147871688a(14) =219336822a(15) =319580553a(16) =459762302a(17) =656093206a(18) =925811194a(19) =1292791666a(20) =1788288642a(21) =2455569322

External references