Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally and vertically.

A253931

Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally and vertically.

Terms

    a(0) =28540a(1) =109666a(2) =451721a(3) =1664470a(4) =3152822a(5) =6795110a(6) =13179071a(7) =20815359a(8) =34379873a(9) =54238467a(10) =84556277a(11) =130915016a(12) =198497618a(13) =294992530a(14) =439444601a(15) =642097226a(16) =927953195a(17) =1323120836a(18) =1881491639a(19) =2642172439a(20) =3680182112a(21) =5073880259

External references